[gnu-emacs] / doc / lispref / vol2.texi

\input texinfo  @c -*-texinfo-*-
@c This file is used for printing the GNU Emacs Lisp Reference Manual
@c in two volumes.  It is a modified version of elisp.texi.
@c Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2001,
@c   2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
@c   Free Software Foundation, Inc.
@c %**start of header
@setfilename elisp
@settitle GNU Emacs Lisp Reference Manual: Volume 2
@c %**end of header

@c See two-volume-cross-refs.txt.
@tex
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\global\chapno=26
@end tex

@c Version of the manual and of Emacs.
@c Please remember to update the edition number in README as well.
@set VERSION  3.0
@set EMACSVER 23.3.50
@set DATE July 2009

@dircategory Emacs
@direntry
* Elisp: (elisp).       The Emacs Lisp Reference Manual.
@end direntry

@c in general, keep the following line commented out, unless doing a
@c copy of this manual that will be published.  the manual should go
@c onto the distribution in the full, 8.5 x 11" size.
@set smallbook

@ifset smallbook
@smallbook
@end ifset

@c per rms and peterb, use 10pt fonts for the main text, mostly to
@c save on paper cost.
@c Do this inside @tex for now, so current makeinfo does not complain.
@tex
@ifset smallbook
@fonttextsize 10
\global\let\urlcolor=\Black % don't print links in grayscale
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@c Combine indices.
@synindex cp fn
@syncodeindex vr fn
@syncodeindex ky fn
@syncodeindex pg fn
@c We use the "type index" to index new functions and variables.
@c @syncodeindex tp fn

@copying
This is edition @value{VERSION} of the GNU Emacs Lisp Reference Manual,@*
corresponding to Emacs version @value{EMACSVER}.

Copyright @copyright{} 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998,
1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011  Free Software
Foundation, Inc.

@quotation
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with the
Invariant Sections being ``GNU General Public License,'' with the
Front-Cover texts being ``A GNU Manual,'' and with the Back-Cover
Texts as in (a) below.  A copy of the license is included in the
section entitled ``GNU Free Documentation License.''

(a) The FSF's Back-Cover Text is: ``You have the freedom to copy and
modify this GNU manual.  Buying copies from the FSF supports it in
developing GNU and promoting software freedom.''
@end quotation
@end copying

@titlepage
@title GNU Emacs Lisp Reference Manual
@subtitle Volume 2
@subtitle For Emacs Version @value{EMACSVER}
@subtitle Revision @value{VERSION}, @value{DATE}

@author by Bil Lewis, Dan LaLiberte, Richard Stallman
@author and the GNU Manual Group
@page
@vskip 0pt plus 1filll
@insertcopying

@sp 2
Published by the Free Software Foundation @*
51 Franklin St, Fifth Floor @*
Boston, MA 02110-1301 @*
USA @*
ISBN 1-882114-74-4

@sp 2
Cover art by Etienne Suvasa.
@end titlepage


@c Print the tables of contents
@summarycontents
@contents


@ifnottex
@node Top, Introduction, (dir), (dir)
@top Emacs Lisp

This Info file contains edition @value{VERSION} of the GNU Emacs Lisp
Reference Manual, corresponding to GNU Emacs version @value{EMACSVER}.
@end ifnottex

@menu
* Introduction::            Introduction and conventions used.

* Lisp Data Types::         Data types of objects in Emacs Lisp.
* Numbers::                 Numbers and arithmetic functions.
* Strings and Characters::  Strings, and functions that work on them.
* Lists::                   Lists, cons cells, and related functions.
* Sequences Arrays Vectors::  Lists, strings and vectors are called sequences.
                                Certain functions act on any kind of sequence.
                                The description of vectors is here as well.
* Hash Tables::             Very fast lookup-tables.
* Symbols::                 Symbols represent names, uniquely.

* Evaluation::              How Lisp expressions are evaluated.
* Control Structures::      Conditionals, loops, nonlocal exits.
* Variables::               Using symbols in programs to stand for values.
* Functions::               A function is a Lisp program
                              that can be invoked from other functions.
* Macros::                  Macros are a way to extend the Lisp language.
* Customization::           Writing customization declarations.

* Loading::                 Reading files of Lisp code into Lisp.
* Byte Compilation::        Compilation makes programs run faster.
* Advising Functions::      Adding to the definition of a function.
* Debugging::               Tools and tips for debugging Lisp programs.

* Read and Print::          Converting Lisp objects to text and back.
* Minibuffers::             Using the minibuffer to read input.
* Command Loop::            How the editor command loop works,
                              and how you can call its subroutines.
* Keymaps::                 Defining the bindings from keys to commands.
* Modes::                   Defining major and minor modes.
* Documentation::           Writing and using documentation strings.

* Files::                   Accessing files.
* Backups and Auto-Saving:: Controlling how backups and auto-save
                              files are made.
* Buffers::                 Creating and using buffer objects.
* Windows::                 Manipulating windows and displaying buffers.
* Frames::                  Making multiple system-level windows.
* Positions::               Buffer positions and motion functions.
* Markers::                 Markers represent positions and update
                              automatically when the text is changed.

* Text::                    Examining and changing text in buffers.
* Non-ASCII Characters::    Non-ASCII text in buffers and strings.
* Searching and Matching::  Searching buffers for strings or regexps.
* Syntax Tables::           The syntax table controls word and list parsing.
* Abbrevs::                 How Abbrev mode works, and its data structures.

* Processes::               Running and communicating with subprocesses.
* Display::                 Features for controlling the screen display.
* System Interface::        Getting the user id, system type, environment
                              variables, and other such things.

Appendices

* Antinews::                Info for users downgrading to Emacs 22.
* GNU Free Documentation License:: The license for this documentation.
* GPL::                     Conditions for copying and changing GNU Emacs.
* Tips::                    Advice and coding conventions for Emacs Lisp.
* GNU Emacs Internals::     Building and dumping Emacs;
                              internal data structures.
* Standard Errors::         List of all error symbols.
* Standard Buffer-Local Variables::
                            List of variables buffer-local in all buffers.
* Standard Keymaps::        List of standard keymaps.
* Standard Hooks::          List of standard hook variables.

* Index::                   Index including concepts, functions, variables,
                              and other terms.

@ignore
* New Symbols::             New functions and variables in Emacs @value{EMACSVER}.
@end ignore

@c Do NOT modify the following 3 lines!  They must have this form to
@c be correctly identified by `texinfo-multiple-files-update'.  In
@c particular, the detailed menu header line MUST be identical to the
@c value of `texinfo-master-menu-header'.  See texnfo-upd.el.

@detailmenu
 --- The Detailed Node Listing ---
 ---------------------------------

Here are other nodes that are inferiors of those already listed,
mentioned here so you can get to them in one step:

Introduction

* Caveats::                 Flaws and a request for help.
* Lisp History::            Emacs Lisp is descended from Maclisp.
* Conventions::             How the manual is formatted.
* Version Info::            Which Emacs version is running?
* Acknowledgements::        The authors, editors, and sponsors of this manual.

Conventions

* Some Terms::              Explanation of terms we use in this manual.
* nil and t::               How the symbols @code{nil} and @code{t} are used.
* Evaluation Notation::     The format we use for examples of evaluation.
* Printing Notation::       The format we use when examples print text.
* Error Messages::          The format we use for examples of errors.
* Buffer Text Notation::    The format we use for buffer contents in examples.
* Format of Descriptions::  Notation for describing functions, variables, etc.

Format of Descriptions

* A Sample Function Description::  A description of an imaginary
                                     function, @code{foo}.
* A Sample Variable Description::  A description of an imaginary
                                     variable, @code{electric-future-map}.

Lisp Data Types

* Printed Representation::  How Lisp objects are represented as text.
* Comments::                Comments and their formatting conventions.
* Programming Types::       Types found in all Lisp systems.
* Editing Types::           Types specific to Emacs.
* Circular Objects::            Read syntax for circular structure.
* Type Predicates::         Tests related to types.
* Equality Predicates::     Tests of equality between any two objects.

Programming Types

* Integer Type::        Numbers without fractional parts.
* Floating Point Type:: Numbers with fractional parts and with a large range.
* Character Type::      The representation of letters, numbers and
                          control characters.
* Symbol Type::         A multi-use object that refers to a function,
                        variable, or property list, and has a unique identity.
* Sequence Type::       Both lists and arrays are classified as sequences.
* Cons Cell Type::      Cons cells, and lists (which are made from cons cells).
* Array Type::          Arrays include strings and vectors.
* String Type::         An (efficient) array of characters.
* Vector Type::         One-dimensional arrays.
* Char-Table Type::     One-dimensional sparse arrays indexed by characters.
* Bool-Vector Type::    One-dimensional arrays of @code{t} or @code{nil}.
* Hash Table Type::     Super-fast lookup tables.
* Function Type::       A piece of executable code you can call from elsewhere.
* Macro Type::          A method of expanding an expression into another
                          expression, more fundamental but less pretty.
* Primitive Function Type::     A function written in C, callable from Lisp.
* Byte-Code Type::      A function written in Lisp, then compiled.
* Autoload Type::       A type used for automatically loading seldom-used
                          functions.

Character Type

* Basic Char Syntax::       Syntax for regular characters.
* General Escape Syntax::   How to specify characters by their codes.
* Ctl-Char Syntax::         Syntax for control characters.
* Meta-Char Syntax::        Syntax for meta-characters.
* Other Char Bits::         Syntax for hyper-, super-, and alt-characters.

Cons Cell and List Types

* Box Diagrams::            Drawing pictures of lists.
* Dotted Pair Notation::    A general syntax for cons cells.
* Association List Type::   A specially constructed list.

String Type

* Syntax for Strings::      How to specify Lisp strings.
* Non-ASCII in Strings::    International characters in strings.
* Nonprinting Characters::  Literal unprintable characters in strings.
* Text Props and Strings::  Strings with text properties.

Editing Types

* Buffer Type::             The basic object of editing.
* Marker Type::             A position in a buffer.
* Window Type::             Buffers are displayed in windows.
* Frame Type::              Windows subdivide frames.
* Terminal Type::           A terminal device displays frames.
* Window Configuration Type::  Recording the way a frame is subdivided.
* Frame Configuration Type::   Recording the status of all frames.
* Process Type::            A subprocess of Emacs running on the underlying OS.
* Stream Type::             Receive or send characters.
* Keymap Type::             What function a keystroke invokes.
* Overlay Type::            How an overlay is represented.
* Font Type::               Fonts for displaying text.

Numbers

* Integer Basics::          Representation and range of integers.
* Float Basics::            Representation and range of floating point.
* Predicates on Numbers::   Testing for numbers.
* Comparison of Numbers::   Equality and inequality predicates.
* Numeric Conversions::     Converting float to integer and vice versa.
* Arithmetic Operations::   How to add, subtract, multiply and divide.
* Rounding Operations::     Explicitly rounding floating point numbers.
* Bitwise Operations::      Logical and, or, not, shifting.
* Math Functions::          Trig, exponential and logarithmic functions.
* Random Numbers::          Obtaining random integers, predictable or not.

Strings and Characters

* String Basics::           Basic properties of strings and characters.
* Predicates for Strings::  Testing whether an object is a string or char.
* Creating Strings::        Functions to allocate new strings.
* Modifying Strings::         Altering the contents of an existing string.
* Text Comparison::         Comparing characters or strings.
* String Conversion::       Converting to and from characters and strings.
* Formatting Strings::      @code{format}: Emacs's analogue of @code{printf}.
* Case Conversion::         Case conversion functions.
* Case Tables::             Customizing case conversion.

Lists

* Cons Cells::              How lists are made out of cons cells.
* List-related Predicates:: Is this object a list?  Comparing two lists.
* List Elements::           Extracting the pieces of a list.
* Building Lists::          Creating list structure.
* List Variables::          Modifying lists stored in variables.
* Modifying Lists::         Storing new pieces into an existing list.
* Sets And Lists::          A list can represent a finite mathematical set.
* Association Lists::       A list can represent a finite relation or mapping.
* Rings::                   Managing a fixed-size ring of objects.

Modifying Existing List Structure

* Setcar::                  Replacing an element in a list.
* Setcdr::                  Replacing part of the list backbone.
                              This can be used to remove or add elements.
* Rearrangement::           Reordering the elements in a list; combining lists.

Sequences, Arrays, and Vectors

* Sequence Functions::      Functions that accept any kind of sequence.
* Arrays::                  Characteristics of arrays in Emacs Lisp.
* Array Functions::         Functions specifically for arrays.
* Vectors::                 Special characteristics of Emacs Lisp vectors.
* Vector Functions::        Functions specifically for vectors.
* Char-Tables::             How to work with char-tables.
* Bool-Vectors::            How to work with bool-vectors.

Hash Tables

* Creating Hash::           Functions to create hash tables.
* Hash Access::             Reading and writing the hash table contents.
* Defining Hash::           Defining new comparison methods.
* Other Hash::              Miscellaneous.

Symbols

* Symbol Components::       Symbols have names, values, function definitions
                              and property lists.
* Definitions::             A definition says how a symbol will be used.
* Creating Symbols::        How symbols are kept unique.
* Property Lists::          Each symbol has a property list
                              for recording miscellaneous information.

Property Lists

* Plists and Alists::       Comparison of the advantages of property
                              lists and association lists.
* Symbol Plists::           Functions to access symbols' property lists.
* Other Plists::            Accessing property lists stored elsewhere.

Evaluation

* Intro Eval::              Evaluation in the scheme of things.
* Forms::                   How various sorts of objects are evaluated.
* Quoting::                 Avoiding evaluation (to put constants in
                              the program).
* Eval::                    How to invoke the Lisp interpreter explicitly.

Kinds of Forms

* Self-Evaluating Forms::   Forms that evaluate to themselves.
* Symbol Forms::            Symbols evaluate as variables.
* Classifying Lists::       How to distinguish various sorts of list forms.
* Function Indirection::    When a symbol appears as the car of a list,
                              we find the real function via the symbol.
* Function Forms::          Forms that call functions.
* Macro Forms::             Forms that call macros.
* Special Forms::           "Special forms" are idiosyncratic primitives,
                              most of them extremely important.
* Autoloading::             Functions set up to load files
                              containing their real definitions.

Control Structures

* Sequencing::              Evaluation in textual order.
* Conditionals::            @code{if}, @code{cond}, @code{when}, @code{unless}.
* Combining Conditions::    @code{and}, @code{or}, @code{not}.
* Iteration::               @code{while} loops.
* Nonlocal Exits::          Jumping out of a sequence.

Nonlocal Exits

* Catch and Throw::         Nonlocal exits for the program's own purposes.
* Examples of Catch::       Showing how such nonlocal exits can be written.
* Errors::                  How errors are signaled and handled.
* Cleanups::                Arranging to run a cleanup form if an
                              error happens.

Errors

* Signaling Errors::        How to report an error.
* Processing of Errors::    What Emacs does when you report an error.
* Handling Errors::         How you can trap errors and continue execution.
* Error Symbols::           How errors are classified for trapping them.

Variables

* Global Variables::        Variable values that exist permanently, everywhere.
* Constant Variables::      Certain "variables" have values that never change.
* Local Variables::         Variable values that exist only temporarily.
* Void Variables::          Symbols that lack values.
* Defining Variables::      A definition says a symbol is used as a variable.
* Tips for Defining::       Things you should think about when you
                              define a variable.
* Accessing Variables::     Examining values of variables whose names
                              are known only at run time.
* Setting Variables::       Storing new values in variables.
* Variable Scoping::        How Lisp chooses among local and global values.
* Buffer-Local Variables::  Variable values in effect only in one buffer.
* File Local Variables::    Handling local variable lists in files.
* Directory Local Variables:: Local variables common to all files in a
                                directory.
* Frame-Local Variables::   Frame-local bindings for variables.
* Variable Aliases::        Variables that are aliases for other variables.
* Variables with Restricted Values::  Non-constant variables whose value can
                                        @emph{not} be an arbitrary Lisp object.

Scoping Rules for Variable Bindings

* Scope::                   Scope means where in the program a value
                              is visible.  Comparison with other languages.
* Extent::                  Extent means how long in time a value exists.
* Impl of Scope::           Two ways to implement dynamic scoping.
* Using Scoping::           How to use dynamic scoping carefully and
                              avoid problems.

Buffer-Local Variables

* Intro to Buffer-Local::   Introduction and concepts.
* Creating Buffer-Local::   Creating and destroying buffer-local bindings.
* Default Value::           The default value is seen in buffers
                              that don't have their own buffer-local values.

Functions

* What Is a Function::      Lisp functions vs. primitives; terminology.
* Lambda Expressions::      How functions are expressed as Lisp objects.
* Function Names::          A symbol can serve as the name of a function.
* Defining Functions::      Lisp expressions for defining functions.
* Calling Functions::       How to use an existing function.
* Mapping Functions::       Applying a function to each element of a list, etc.
* Anonymous Functions::     Lambda expressions are functions with no names.
* Function Cells::          Accessing or setting the function definition
                              of a symbol.
* Obsolete Functions::      Declaring functions obsolete.
* Inline Functions::        Defining functions that the compiler
                              will open code.
* Declaring Functions::     Telling the compiler that a function is defined.
* Function Safety::         Determining whether a function is safe to call.
* Related Topics::          Cross-references to specific Lisp primitives
                              that have a special bearing on how
                              functions work.

Lambda Expressions

* Lambda Components::       The parts of a lambda expression.
* Simple Lambda::           A simple example.
* Argument List::           Details and special features of argument lists.
* Function Documentation::  How to put documentation in a function.

Macros

* Simple Macro::            A basic example.
* Expansion::               How, when and why macros are expanded.
* Compiling Macros::        How macros are expanded by the compiler.
* Defining Macros::         How to write a macro definition.
* Backquote::               Easier construction of list structure.
* Problems with Macros::    Don't evaluate the macro arguments too many times.
                              Don't hide the user's variables.
* Indenting Macros::        Specifying how to indent macro calls.

Common Problems Using Macros

* Wrong Time::             Do the work in the expansion, not in the macro.
* Argument Evaluation::    The expansion should evaluate each macro arg once.
* Surprising Local Vars::  Local variable bindings in the expansion
                              require special care.
* Eval During Expansion::  Don't evaluate them; put them in the expansion.
* Repeated Expansion::     Avoid depending on how many times expansion is done.

Writing Customization Definitions

* Common Keywords::         Common keyword arguments for all kinds of
                              customization declarations.
* Group Definitions::       Writing customization group definitions.
* Variable Definitions::    Declaring user options.
* Customization Types::     Specifying the type of a user option.

Customization Types

* Simple Types::            Simple customization types: sexp, integer, number,
                              string, file, directory, alist.
* Composite Types::         Build new types from other types or data.
* Splicing into Lists::     Splice elements into list with @code{:inline}.
* Type Keywords::           Keyword-argument pairs in a customization type.
* Defining New Types::      Give your type a name.

Loading

* How Programs Do Loading:: The @code{load} function and others.
* Load Suffixes::           Details about the suffixes that @code{load} tries.
* Library Search::          Finding a library to load.
* Loading Non-ASCII::       Non-@acronym{ASCII} characters in Emacs Lisp files.
* Autoload::                Setting up a function to autoload.
* Repeated Loading::        Precautions about loading a file twice.
* Named Features::          Loading a library if it isn't already loaded.
* Where Defined::           Finding which file defined a certain symbol.
* Unloading::               How to "unload" a library that was loaded.
* Hooks for Loading::       Providing code to be run when
                              particular libraries are loaded.

Byte Compilation

* Speed of Byte-Code::      An example of speedup from byte compilation.
* Compilation Functions::   Byte compilation functions.
* Docs and Compilation::    Dynamic loading of documentation strings.
* Dynamic Loading::         Dynamic loading of individual functions.
* Eval During Compile::     Code to be evaluated when you compile.
* Compiler Errors::         Handling compiler error messages.
* Byte-Code Objects::       The data type used for byte-compiled functions.
* Disassembly::             Disassembling byte-code; how to read byte-code.

Advising Emacs Lisp Functions

* Simple Advice::           A simple example to explain the basics of advice.
* Defining Advice::         Detailed description of @code{defadvice}.
* Around-Advice::           Wrapping advice around a function's definition.
* Computed Advice::         ...is to @code{defadvice} as @code{fset} is to @code{defun}.
* Activation of Advice::    Advice doesn't do anything until you activate it.
* Enabling Advice::         You can enable or disable each piece of advice.
* Preactivation::           Preactivation is a way of speeding up the
                              loading of compiled advice.
* Argument Access in Advice:: How advice can access the function's arguments.
* Advising Primitives::     Accessing arguments when advising a primitive.
* Combined Definition::     How advice is implemented.

Debugging Lisp Programs

* Debugger::                How the Emacs Lisp debugger is implemented.
* Edebug::                  A source-level Emacs Lisp debugger.
* Syntax Errors::           How to find syntax errors.
* Test Coverage::           Ensuring you have tested all branches in your code.
* Compilation Errors::      How to find errors that show up in
                              byte compilation.

The Lisp Debugger

* Error Debugging::         Entering the debugger when an error happens.
* Infinite Loops::          Stopping and debugging a program that doesn't exit.
* Function Debugging::      Entering it when a certain function is called.
* Explicit Debug::          Entering it at a certain point in the program.
* Using Debugger::          What the debugger does; what you see while in it.
* Debugger Commands::       Commands used while in the debugger.
* Invoking the Debugger::   How to call the function @code{debug}.
* Internals of Debugger::   Subroutines of the debugger, and global variables.

Edebug

* Using Edebug::            Introduction to use of Edebug.
* Instrumenting::           You must instrument your code
                              in order to debug it with Edebug.
* Edebug Execution Modes::  Execution modes, stopping more or less often.
* Jumping::                 Commands to jump to a specified place.
* Edebug Misc::             Miscellaneous commands.
* Breaks::                  Setting breakpoints to make the program stop.
* Trapping Errors::         Trapping errors with Edebug.
* Edebug Views::            Views inside and outside of Edebug.
* Edebug Eval::             Evaluating expressions within Edebug.
* Eval List::               Expressions whose values are displayed
                              each time you enter Edebug.
* Printing in Edebug::      Customization of printing.
* Trace Buffer::            How to produce trace output in a buffer.
* Coverage Testing::        How to test evaluation coverage.
* The Outside Context::     Data that Edebug saves and restores.
* Edebug and Macros::       Specifying how to handle macro calls.
* Edebug Options::          Option variables for customizing Edebug.

Breaks

* Breakpoints::             Breakpoints at stop points.
* Global Break Condition::  Breaking on an event.
* Source Breakpoints::      Embedding breakpoints in source code.

The Outside Context

* Checking Whether to Stop::When Edebug decides what to do.
* Edebug Display Update::   When Edebug updates the display.
* Edebug Recursive Edit::   When Edebug stops execution.

Edebug and Macros

* Instrumenting Macro Calls::The basic problem.
* Specification List::      How to specify complex patterns of evaluation.
* Backtracking::            What Edebug does when matching fails.
* Specification Examples::  To help understand specifications.

Debugging Invalid Lisp Syntax

* Excess Open::             How to find a spurious open paren or missing close.
* Excess Close::            How to find a spurious close paren or missing open.

Reading and Printing Lisp Objects

* Streams Intro::           Overview of streams, reading and printing.
* Input Streams::           Various data types that can be used as
                              input streams.
* Input Functions::         Functions to read Lisp objects from text.
* Output Streams::          Various data types that can be used as
                              output streams.
* Output Functions::        Functions to print Lisp objects as text.
* Output Variables::        Variables that control what the printing
                              functions do.

Minibuffers

* Intro to Minibuffers::    Basic information about minibuffers.
* Text from Minibuffer::    How to read a straight text string.
* Object from Minibuffer::  How to read a Lisp object or expression.
* Minibuffer History::      Recording previous minibuffer inputs
                              so the user can reuse them.
* Initial Input::           Specifying initial contents for the minibuffer.
* Completion::              How to invoke and customize completion.
* Yes-or-No Queries::       Asking a question with a simple answer.
* Multiple Queries::        Asking a series of similar questions.
* Reading a Password::      Reading a password from the terminal.
* Minibuffer Commands::     Commands used as key bindings in minibuffers.
* Minibuffer Contents::     How such commands access the minibuffer text.
* Minibuffer Windows::      Operating on the special minibuffer windows.
* Recursive Mini::          Whether recursive entry to minibuffer is allowed.
* Minibuffer Misc::         Various customization hooks and variables.

Completion

* Basic Completion::        Low-level functions for completing strings.
                              (These are too low level to use the minibuffer.)
* Minibuffer Completion::   Invoking the minibuffer with completion.
* Completion Commands::     Minibuffer commands that do completion.
* High-Level Completion::   Convenient special cases of completion
                              (reading buffer name, file name, etc.).
* Reading File Names::      Using completion to read file names and
                              shell commands.
* Completion Styles::       Specifying rules for performing completion.
* Programmed Completion::   Writing your own completion-function.

Command Loop

* Command Overview::    How the command loop reads commands.
* Defining Commands::   Specifying how a function should read arguments.
* Interactive Call::    Calling a command, so that it will read arguments.
* Distinguish Interactive::     Making a command distinguish interactive calls.
* Command Loop Info::   Variables set by the command loop for you to examine.
* Adjusting Point::     Adjustment of point after a command.
* Input Events::        What input looks like when you read it.
* Reading Input::       How to read input events from the keyboard or mouse.
* Special Events::      Events processed immediately and individually.
* Waiting::             Waiting for user input or elapsed time.
* Quitting::            How @kbd{C-g} works.  How to catch or defer quitting.
* Prefix Command Arguments::    How the commands to set prefix args work.
* Recursive Editing::   Entering a recursive edit,
                          and why you usually shouldn't.
* Disabling Commands::  How the command loop handles disabled commands.
* Command History::     How the command history is set up, and how accessed.
* Keyboard Macros::     How keyboard macros are implemented.

Defining Commands

* Using Interactive::       General rules for @code{interactive}.
* Interactive Codes::       The standard letter-codes for reading arguments
                              in various ways.
* Interactive Examples::    Examples of how to read interactive arguments.

Input Events

* Keyboard Events::         Ordinary characters--keys with symbols on them.
* Function Keys::           Function keys--keys with names, not symbols.
* Mouse Events::            Overview of mouse events.
* Click Events::            Pushing and releasing a mouse button.
* Drag Events::             Moving the mouse before releasing the button.
* Button-Down Events::      A button was pushed and not yet released.
* Repeat Events::           Double and triple click (or drag, or down).
* Motion Events::           Just moving the mouse, not pushing a button.
* Focus Events::            Moving the mouse between frames.
* Misc Events::             Other events the system can generate.
* Event Examples::          Examples of the lists for mouse events.
* Classifying Events::      Finding the modifier keys in an event symbol.
                              Event types.
* Accessing Mouse::         Functions to extract info from mouse events.
* Accessing Scroll::        Functions to get info from scroll bar events.
* Strings of Events::       Special considerations for putting
                              keyboard character events in a string.

Reading Input

* Key Sequence Input::      How to read one key sequence.
* Reading One Event::       How to read just one event.
* Event Mod::               How Emacs modifies events as they are read.
* Invoking the Input Method::   How reading an event uses the input method.
* Quoted Character Input::  Asking the user to specify a character.
* Event Input Misc::        How to reread or throw away input events.

Keymaps

* Key Sequences::           Key sequences as Lisp objects.
* Keymap Basics::           Basic concepts of keymaps.
* Format of Keymaps::       What a keymap looks like as a Lisp object.
* Creating Keymaps::        Functions to create and copy keymaps.
* Inheritance and Keymaps:: How one keymap can inherit the bindings
                              of another keymap.
* Prefix Keys::             Defining a key with a keymap as its definition.
* Active Keymaps::          How Emacs searches the active keymaps
                              for a key binding.
* Searching Keymaps::       A pseudo-Lisp summary of searching active maps.
* Controlling Active Maps:: Each buffer has a local keymap
                               to override the standard (global) bindings.
                               A minor mode can also override them.
* Key Lookup::              Finding a key's binding in one keymap.
* Functions for Key Lookup::    How to request key lookup.
* Changing Key Bindings::   Redefining a key in a keymap.
* Remapping Commands::      A keymap can translate one command to another.
* Translation Keymaps::     Keymaps for translating sequences of events.
* Key Binding Commands::    Interactive interfaces for redefining keys.
* Scanning Keymaps::        Looking through all keymaps, for printing help.
* Menu Keymaps::            Defining a menu as a keymap.

Menu Keymaps

* Defining Menus::          How to make a keymap that defines a menu.
* Mouse Menus::             How users actuate the menu with the mouse.
* Keyboard Menus::          How users actuate the menu with the keyboard.
* Menu Example::            Making a simple menu.
* Menu Bar::                How to customize the menu bar.
* Tool Bar::                A tool bar is a row of images.
* Modifying Menus::         How to add new items to a menu.

Defining Menus

* Simple Menu Items::       A simple kind of menu key binding,
                              limited in capabilities.
* Extended Menu Items::     More powerful menu item definitions
                              let you specify keywords to enable
                              various features.
* Menu Separators::         Drawing a horizontal line through a menu.
* Alias Menu Items::        Using command aliases in menu items.

Major and Minor Modes

* Hooks::              How to use hooks; how to write code that provides hooks.
* Major Modes::        Defining major modes.
* Minor Modes::        Defining minor modes.
* Mode Line Format::   Customizing the text that appears in the mode line.
* Imenu::              How a mode can provide a menu
                         of definitions in the buffer.
* Font Lock Mode::     How modes can highlight text according to syntax.
* Desktop Save Mode::  How modes can have buffer state saved between
                         Emacs sessions.

Hooks

* Running Hooks::      How to run a hook.
* Setting Hooks::      How to put functions on a hook, or remove them.

Major Modes

* Major Mode Basics::
* Major Mode Conventions::  Coding conventions for keymaps, etc.
* Auto Major Mode::         How Emacs chooses the major mode automatically.
* Mode Help::               Finding out how to use a mode.
* Derived Modes::           Defining a new major mode based on another major
                              mode.
* Generic Modes::           Defining a simple major mode that supports
                              comment syntax and Font Lock mode.
* Mode Hooks::              Hooks run at the end of major mode functions.
* Example Major Modes::     Text mode and Lisp modes.

Minor Modes

* Minor Mode Conventions::  Tips for writing a minor mode.
* Keymaps and Minor Modes:: How a minor mode can have its own keymap.
* Defining Minor Modes::    A convenient facility for defining minor modes.

Mode Line Format

* Mode Line Basics::        Basic ideas of mode line control.
* Mode Line Data::          The data structure that controls the mode line.
* Mode Line Top::           The top level variable, mode-line-format.
* Mode Line Variables::     Variables used in that data structure.
* %-Constructs::            Putting information into a mode line.
* Properties in Mode::      Using text properties in the mode line.
* Header Lines::            Like a mode line, but at the top.
* Emulating Mode Line::     Formatting text as the mode line would.

Font Lock Mode

* Font Lock Basics::        Overview of customizing Font Lock.
* Search-based Fontification::  Fontification based on regexps.
* Customizing Keywords::    Customizing search-based fontification.
* Other Font Lock Variables::   Additional customization facilities.
* Levels of Font Lock::     Each mode can define alternative levels
                              so that the user can select more or less.
* Precalculated Fontification:: How Lisp programs that produce the buffer
                                  contents can also specify how to fontify it.
* Faces for Font Lock::     Special faces specifically for Font Lock.
* Syntactic Font Lock::     Fontification based on syntax tables.
* Setting Syntax Properties::   Defining character syntax based on context
                                  using the Font Lock mechanism.
* Multiline Font Lock::     How to coerce Font Lock into properly
                              highlighting multiline constructs.

Multiline Font Lock Constructs

* Font Lock Multiline::     Marking multiline chunks with a text property.
* Region to Refontify::     Controlling which region gets refontified
                              after a buffer change.

Documentation

* Documentation Basics::    Good style for doc strings.
                              Where to put them.  How Emacs stores them.
* Accessing Documentation:: How Lisp programs can access doc strings.
* Keys in Documentation::   Substituting current key bindings.
* Describing Characters::   Making printable descriptions of
                              non-printing characters and key sequences.
* Help Functions::          Subroutines used by Emacs help facilities.

Files

* Visiting Files::          Reading files into Emacs buffers for editing.
* Saving Buffers::          Writing changed buffers back into files.
* Reading from Files::      Reading files into buffers without visiting.
* Writing to Files::        Writing new files from parts of buffers.
* File Locks::              Locking and unlocking files, to prevent
                              simultaneous editing by two people.
* Information about Files:: Testing existence, accessibility, size of files.
* Changing Files::          Renaming files, changing protection, etc.
* File Names::              Decomposing and expanding file names.
* Contents of Directories:: Getting a list of the files in a directory.
* Create/Delete Dirs::      Creating and Deleting Directories.
* Magic File Names::        Defining "magic" special handling
                              for certain file names.
* Format Conversion::       Conversion to and from various file formats.

Visiting Files

* Visiting Functions::      The usual interface functions for visiting.
* Subroutines of Visiting:: Lower-level subroutines that they use.

Information about Files

* Testing Accessibility::   Is a given file readable?  Writable?
* Kinds of Files::          Is it a directory?  A symbolic link?
* Truenames::               Eliminating symbolic links from a file name.
* File Attributes::         How large is it?  Any other names?  Etc.
* Locating Files::          How to find a file in standard places.

File Names

* File Name Components::    The directory part of a file name, and the rest.
* Relative File Names::     Some file names are relative to a current directory.
* Directory Names::         A directory's name as a directory
                              is different from its name as a file.
* File Name Expansion::     Converting relative file names to absolute ones.
* Unique File Names::       Generating names for temporary files.
* File Name Completion::    Finding the completions for a given file name.
* Standard File Names::     If your package uses a fixed file name,
                              how to handle various operating systems simply.

File Format Conversion

* Format Conversion Overview::   @code{insert-file-contents} and @code{write-region}.
* Format Conversion Round-Trip:: Using @code{format-alist}.
* Format Conversion Piecemeal::  Specifying non-paired conversion.

Backups and Auto-Saving

* Backup Files::            How backup files are made; how their names
                              are chosen.
* Auto-Saving::             How auto-save files are made; how their
                              names are chosen.
* Reverting::               @code{revert-buffer}, and how to customize
                              what it does.

Backup Files

* Making Backups::          How Emacs makes backup files, and when.
* Rename or Copy::          Two alternatives: renaming the old file
                              or copying it.
* Numbered Backups::        Keeping multiple backups for each source file.
* Backup Names::            How backup file names are computed; customization.

Buffers

* Buffer Basics::           What is a buffer?
* Current Buffer::          Designating a buffer as current
                              so that primitives will access its contents.
* Buffer Names::            Accessing and changing buffer names.
* Buffer File Name::        The buffer file name indicates which file
                              is visited.
* Buffer Modification::     A buffer is @dfn{modified} if it needs to be saved.
* Modification Time::       Determining whether the visited file was changed
                              ``behind Emacs's back''.
* Read Only Buffers::       Modifying text is not allowed in a
                              read-only buffer.
* The Buffer List::         How to look at all the existing buffers.
* Creating Buffers::        Functions that create buffers.
* Killing Buffers::         Buffers exist until explicitly killed.
* Indirect Buffers::        An indirect buffer shares text with some
                              other buffer.
* Swapping Text::           Swapping text between two buffers.
* Buffer Gap::              The gap in the buffer.

Windows

* Basic Windows::           Basic information on using windows.
* Splitting Windows::       Splitting one window into two windows.
* Deleting Windows::        Deleting a window gives its space to other windows.
* Selecting Windows::       The selected window is the one that you edit in.
* Cyclic Window Ordering::  Moving around the existing windows.
* Buffers and Windows::     Each window displays the contents of a buffer.
* Displaying Buffers::      Higher-level functions for displaying a buffer
                              and choosing a window for it.
* Choosing Window::         How to choose a window for displaying a buffer.
* Dedicated Windows::       How to avoid displaying another buffer in
                              a specific window.          
* Window Point::            Each window has its own location of point.
* Window Start and End::    Buffer positions indicating which text is
                              on-screen in a window.
* Textual Scrolling::       Moving text up and down through the window.
* Vertical Scrolling::      Moving the contents up and down on the window.
* Horizontal Scrolling::    Moving the contents sideways on the window.
* Size of Window::          Accessing the size of a window.
* Resizing Windows::        Changing the size of a window.
* Coordinates and Windows:: Converting coordinates to windows.
* Window Tree::             The layout and sizes of all windows in a frame.
* Window Configurations::   Saving and restoring the state of the screen.
* Window Parameters::       Associating additional information with windows.
* Window Hooks::            Hooks for scrolling, window size changes,
                              redisplay going past a certain point,
                              or window configuration changes.

Frames

* Creating Frames::         Creating additional frames.
* Multiple Terminals::      Displaying on several different devices.
* Frame Parameters::        Controlling frame size, position, font, etc.
* Terminal Parameters::     Parameters common for all frames on terminal.
* Frame Titles::            Automatic updating of frame titles.
* Deleting Frames::         Frames last until explicitly deleted.
* Finding All Frames::      How to examine all existing frames.
* Frames and Windows::      A frame contains windows;
                              display of text always works through windows.
* Minibuffers and Frames::  How a frame finds the minibuffer to use.
* Input Focus::             Specifying the selected frame.
* Visibility of Frames::    Frames may be visible or invisible, or icons.
* Raising and Lowering::    Raising a frame makes it hide other windows;
                              lowering it makes the others hide it.
* Frame Configurations::    Saving the state of all frames.
* Mouse Tracking::          Getting events that say when the mouse moves.
* Mouse Position::          Asking where the mouse is, or moving it.
* Pop-Up Menus::            Displaying a menu for the user to select from.
* Dialog Boxes::            Displaying a box to ask yes or no.
* Pointer Shape::           Specifying the shape of the mouse pointer.
* Window System Selections::Transferring text to and from other X clients.
* Drag and Drop::               Internals of Drag-and-Drop implementation.
* Color Names::             Getting the definitions of color names.
* Text Terminal Colors::    Defining colors for text-only terminals.
* Resources::               Getting resource values from the server.
* Display Feature Testing:: Determining the features of a terminal.

Frame Parameters

* Parameter Access::        How to change a frame's parameters.
* Initial Parameters::      Specifying frame parameters when you make a frame.
* Window Frame Parameters:: List of frame parameters for window systems.
* Size and Position::       Changing the size and position of a frame.
* Geometry::                Parsing geometry specifications.

Window Frame Parameters

* Basic Parameters::        Parameters that are fundamental.
* Position Parameters::     The position of the frame on the screen.
* Size Parameters::         Frame's size.
* Layout Parameters::       Size of parts of the frame, and
                              enabling or disabling some parts.
* Buffer Parameters::       Which buffers have been or should be shown.
* Management Parameters::   Communicating with the window manager.
* Cursor Parameters::       Controlling the cursor appearance.
* Font and Color Parameters:: Fonts and colors for the frame text.

Positions

* Point::                   The special position where editing takes place.
* Motion::                  Changing point.
* Excursions::              Temporary motion and buffer changes.
* Narrowing::               Restricting editing to a portion of the buffer.

Motion

* Character Motion::        Moving in terms of characters.
* Word Motion::             Moving in terms of words.
* Buffer End Motion::       Moving to the beginning or end of the buffer.
* Text Lines::              Moving in terms of lines of text.
* Screen Lines::            Moving in terms of lines as displayed.
* List Motion::             Moving by parsing lists and sexps.
* Skipping Characters::     Skipping characters belonging to a certain set.

Markers

* Overview of Markers::     The components of a marker, and how it relocates.
* Predicates on Markers::   Testing whether an object is a marker.
* Creating Markers::        Making empty markers or markers at certain places.
* Information from Markers::Finding the marker's buffer or character position.
* Marker Insertion Types::  Two ways a marker can relocate when you
                              insert where it points.
* Moving Markers::          Moving the marker to a new buffer or position.
* The Mark::                How "the mark" is implemented with a marker.
* The Region::              How to access "the region".

Text

* Near Point::              Examining text in the vicinity of point.
* Buffer Contents::         Examining text in a general fashion.
* Comparing Text::          Comparing substrings of buffers.
* Insertion::               Adding new text to a buffer.
* Commands for Insertion::  User-level commands to insert text.
* Deletion::                Removing text from a buffer.
* User-Level Deletion::     User-level commands to delete text.
* The Kill Ring::           Where removed text sometimes is saved for
                              later use.
* Undo::                    Undoing changes to the text of a buffer.
* Maintaining Undo::        How to enable and disable undo information.
                              How to control how much information is kept.
* Filling::                 Functions for explicit filling.
* Margins::                 How to specify margins for filling commands.
* Adaptive Fill::           Adaptive Fill mode chooses a fill prefix
                              from context.
* Auto Filling::            How auto-fill mode is implemented to break lines.
* Sorting::                 Functions for sorting parts of the buffer.
* Columns::                 Computing horizontal positions, and using them.
* Indentation::             Functions to insert or adjust indentation.
* Case Changes::            Case conversion of parts of the buffer.
* Text Properties::         Assigning Lisp property lists to text characters.
* Substitution::            Replacing a given character wherever it appears.
* Transposition::           Swapping two portions of a buffer.
* Registers::               How registers are implemented.  Accessing
                              the text or position stored in a register.
* Base 64::                 Conversion to or from base 64 encoding.
* MD5 Checksum::            Compute the MD5 "message digest"/"checksum".
* Atomic Changes::          Installing several buffer changes "atomically".
* Change Hooks::            Supplying functions to be run when text is changed.

The Kill Ring

* Kill Ring Concepts::      What text looks like in the kill ring.
* Kill Functions::          Functions that kill text.
* Yanking::                 How yanking is done.
* Yank Commands::           Commands that access the kill ring.
* Low-Level Kill Ring::     Functions and variables for kill ring access.
* Internals of Kill Ring::  Variables that hold kill ring data.

Indentation

* Primitive Indent::        Functions used to count and insert indentation.
* Mode-Specific Indent::    Customize indentation for different modes.
* Region Indent::           Indent all the lines in a region.
* Relative Indent::         Indent the current line based on previous lines.
* Indent Tabs::             Adjustable, typewriter-like tab stops.
* Motion by Indent::        Move to first non-blank character.

Text Properties

* Examining Properties::    Looking at the properties of one character.
* Changing Properties::     Setting the properties of a range of text.
* Property Search::         Searching for where a property changes value.
* Special Properties::      Particular properties with special meanings.
* Format Properties::       Properties for representing formatting of text.
* Sticky Properties::       How inserted text gets properties from
                              neighboring text.
* Lazy Properties::         Computing text properties in a lazy fashion
                              only when text is examined.
* Clickable Text::          Using text properties to make regions of text
                              do something when you click on them.
* Fields::                  The @code{field} property defines
                              fields within the buffer.
* Not Intervals::           Why text properties do not use
                              Lisp-visible text intervals.

Non-@acronym{ASCII} Characters

* Text Representations::    How Emacs represents text.
* Converting Representations::  Converting unibyte to multibyte and vice versa.
* Selecting a Representation::  Treating a byte sequence as unibyte or multi.
* Character Codes::         How unibyte and multibyte relate to
                                codes of individual characters.
* Character Properties::    Character attributes that define their
                                behavior and handling.
* Character Sets::          The space of possible character codes
                                is divided into various character sets.
* Scanning Charsets::       Which character sets are used in a buffer?
* Translation of Characters::   Translation tables are used for conversion.
* Coding Systems::          Coding systems are conversions for saving files.
* Input Methods::           Input methods allow users to enter various
                                non-ASCII characters without special keyboards.
* Locales::                 Interacting with the POSIX locale.

Coding Systems

* Coding System Basics::    Basic concepts.
* Encoding and I/O::        How file I/O functions handle coding systems.
* Lisp and Coding Systems:: Functions to operate on coding system names.
* User-Chosen Coding Systems::  Asking the user to choose a coding system.
* Default Coding Systems::  Controlling the default choices.
* Specifying Coding Systems::   Requesting a particular coding system
                                    for a single file operation.
* Explicit Encoding::       Encoding or decoding text without doing I/O.
* Terminal I/O Encoding::   Use of encoding for terminal I/O.
* MS-DOS File Types::       How DOS "text" and "binary" files
                                relate to coding systems.

Searching and Matching

* String Search::           Search for an exact match.
* Searching and Case::      Case-independent or case-significant searching.
* Regular Expressions::     Describing classes of strings.
* Regexp Search::           Searching for a match for a regexp.
* POSIX Regexps::           Searching POSIX-style for the longest match.
* Match Data::              Finding out which part of the text matched,
                              after a string or regexp search.
* Search and Replace::      Commands that loop, searching and replacing.
* Standard Regexps::        Useful regexps for finding sentences, pages,...

Regular Expressions

* Syntax of Regexps::       Rules for writing regular expressions.
* Regexp Example::          Illustrates regular expression syntax.
* Regexp Functions::        Functions for operating on regular expressions.

Syntax of Regular Expressions

* Regexp Special::          Special characters in regular expressions.
* Char Classes::            Character classes used in regular expressions.
* Regexp Backslash::        Backslash-sequences in regular expressions.

The Match Data

* Replacing Match::         Replacing a substring that was matched.
* Simple Match Data::       Accessing single items of match data,
                              such as where a particular subexpression started.
* Entire Match Data::       Accessing the entire match data at once, as a list.
* Saving Match Data::       Saving and restoring the match data.

Syntax Tables

* Syntax Basics::           Basic concepts of syntax tables.
* Syntax Descriptors::      How characters are classified.
* Syntax Table Functions::  How to create, examine and alter syntax tables.
* Syntax Properties::       Overriding syntax with text properties.
* Motion and Syntax::       Moving over characters with certain syntaxes.
* Parsing Expressions::     Parsing balanced expressions
                              using the syntax table.
* Standard Syntax Tables::  Syntax tables used by various major modes.
* Syntax Table Internals::  How syntax table information is stored.
* Categories::              Another way of classifying character syntax.

Syntax Descriptors

* Syntax Class Table::      Table of syntax classes.
* Syntax Flags::            Additional flags each character can have.

Parsing Expressions

* Motion via Parsing::      Motion functions that work by parsing.
* Position Parse::          Determining the syntactic state of a position.
* Parser State::            How Emacs represents a syntactic state.
* Low-Level Parsing::       Parsing across a specified region.
* Control Parsing::         Parameters that affect parsing.

Abbrevs and Abbrev Expansion

* Abbrev Mode::             Setting up Emacs for abbreviation.
* Abbrev Tables::           Creating and working with abbrev tables.
* Defining Abbrevs::        Specifying abbreviations and their expansions.
* Abbrev Files::            Saving abbrevs in files.
* Abbrev Expansion::        Controlling expansion; expansion subroutines.
* Standard Abbrev Tables::  Abbrev tables used by various major modes.
* Abbrev Properties::       How to read and set abbrev properties.
                            Which properties have which effect.
* Abbrev Table Properties:: How to read and set abbrev table properties.
                            Which properties have which effect.

Processes

* Subprocess Creation::     Functions that start subprocesses.
* Shell Arguments::         Quoting an argument to pass it to a shell.
* Synchronous Processes::   Details of using synchronous subprocesses.
* Asynchronous Processes::  Starting up an asynchronous subprocess.
* Deleting Processes::      Eliminating an asynchronous subprocess.
* Process Information::     Accessing run-status and other attributes.
* Input to Processes::      Sending input to an asynchronous subprocess.
* Signals to Processes::    Stopping, continuing or interrupting
                              an asynchronous subprocess.
* Output from Processes::   Collecting output from an asynchronous subprocess.
* Sentinels::               Sentinels run when process run-status changes.
* Query Before Exit::       Whether to query if exiting will kill a process.
* System Processes::        Accessing other processes running on your system.
* Transaction Queues::      Transaction-based communication with subprocesses.
* Network::                 Opening network connections.
* Network Servers::         Network servers let Emacs accept net connections.
* Datagrams::               UDP network connections.
* Low-Level Network::       Lower-level but more general function
                              to create connections and servers.
* Misc Network::            Additional relevant functions for
                              network connections.
* Serial Ports::            Communicating with serial ports.
* Byte Packing::            Using bindat to pack and unpack binary data.

Receiving Output from Processes

* Process Buffers::         If no filter, output is put in a buffer.
* Filter Functions::        Filter functions accept output from the process.
* Decoding Output::         Filters can get unibyte or multibyte strings.
* Accepting Output::        How to wait until process output arrives.

Low-Level Network Access

* Network Processes::       Using @code{make-network-process}.
* Network Options::         Further control over network connections.
* Network Feature Testing:: Determining which network features work on
                              the machine you are using.

Packing and Unpacking Byte Arrays

* Bindat Spec::             Describing data layout.
* Bindat Functions::        Doing the unpacking and packing.
* Bindat Examples::         Samples of what bindat.el can do for you!

Emacs Display

* Refresh Screen::          Clearing the screen and redrawing everything on it.
* Forcing Redisplay::       Forcing redisplay.
* Truncation::              Folding or wrapping long text lines.
* The Echo Area::           Displaying messages at the bottom of the screen.
* Warnings::                Displaying warning messages for the user.
* Invisible Text::          Hiding part of the buffer text.
* Selective Display::       Hiding part of the buffer text (the old way).
* Temporary Displays::      Displays that go away automatically.
* Overlays::                Use overlays to highlight parts of the buffer.
* Width::                   How wide a character or string is on the screen.
* Line Height::             Controlling the height of lines.
* Faces::                   A face defines a graphics style
                              for text characters: font, colors, etc.
* Fringes::                 Controlling window fringes.
* Scroll Bars::             Controlling vertical scroll bars.
* Display Property::        Enabling special display features.
* Images::                  Displaying images in Emacs buffers.
* Buttons::                 Adding clickable buttons to Emacs buffers.
* Abstract Display::        Emacs' Widget for Object Collections.
* Blinking::                How Emacs shows the matching open parenthesis.
* Usual Display::           The usual conventions for displaying
                              nonprinting chars.
* Display Tables::          How to specify other conventions.
* Beeping::                 Audible signal to the user.
* Window Systems::          Which window system is being used.

The Echo Area

* Displaying Messages::     Explicitly displaying text in the echo area.
* Progress::                Informing user about progress of a long operation.
* Logging Messages::        Echo area messages are logged for the user.
* Echo Area Customization:: Controlling the echo area.

Reporting Warnings

* Warning Basics::          Warnings concepts and functions to report them.
* Warning Variables::       Variables programs bind to customize
                              their warnings.
* Warning Options::         Variables users set to control display of warnings.

Overlays

* Managing Overlays::       Creating and moving overlays.
* Overlay Properties::      How to read and set properties.
                            What properties do to the screen display.
* Finding Overlays::        Searching for overlays.

Faces

* Defining Faces::          How to define a face with @code{defface}.
* Face Attributes::         What is in a face?
* Attribute Functions::     Functions to examine and set face attributes.
* Displaying Faces::        How Emacs combines the faces specified for
                              a character.
* Face Remapping::         Remapping faces to alternative definitions.
* Face Functions::          How to define and examine faces.
* Auto Faces::              Hook for automatic face assignment.
* Font Selection::          Finding the best available font for a face.
* Font Lookup::             Looking up the names of available fonts
                              and information about them.
* Fontsets::                A fontset is a collection of fonts
                              that handle a range of character sets.
* Low-Level Font::          Lisp representation for character display fonts.

Fringes

* Fringe Size/Pos::         Specifying where to put the window fringes.
* Fringe Indicators::       Displaying indicator icons in the window fringes.
* Fringe Cursors::          Displaying cursors in the right fringe.
* Fringe Bitmaps::          Specifying bitmaps for fringe indicators.
* Customizing Bitmaps::     Specifying your own bitmaps to use in the fringes.
* Overlay Arrow::           Display of an arrow to indicate position.

The @code{display} Property

* Replacing Specs::         Display specs that replace the text.
* Specified Space::         Displaying one space with a specified width.
* Pixel Specification::     Specifying space width or height in pixels.
* Other Display Specs::     Displaying an image; adjusting the height,
                              spacing, and other properties of text.
* Display Margins::         Displaying text or images to the side of
                              the main text.

Images

* Image Formats::           Supported image formats.
* Image Descriptors::       How to specify an image for use in @code{:display}.
* XBM Images::              Special features for XBM format.
* XPM Images::              Special features for XPM format.
* GIF Images::              Special features for GIF format.
* TIFF Images::             Special features for TIFF format.
* PostScript Images::       Special features for PostScript format.
* Other Image Types::       Various other formats are supported.
* Defining Images::         Convenient ways to define an image for later use.
* Showing Images::          Convenient ways to display an image once
                              it is defined.
* Image Cache::             Internal mechanisms of image display.

Buttons

* Button Properties::       Button properties with special meanings.
* Button Types::            Defining common properties for classes of buttons.
* Making Buttons::          Adding buttons to Emacs buffers.
* Manipulating Buttons::    Getting and setting properties of buttons.
* Button Buffer Commands::  Buffer-wide commands and bindings for buttons.

Abstract Display

* Abstract Display Functions::  Functions in the Ewoc package.
* Abstract Display Example::    Example of using Ewoc.

Display Tables

* Display Table Format::    What a display table consists of.
* Active Display Table::    How Emacs selects a display table to use.
* Glyphs::                  How to define a glyph, and what glyphs mean.

Operating System Interface

* Starting Up::             Customizing Emacs startup processing.
* Getting Out::             How exiting works (permanent or temporary).
* System Environment::      Distinguish the name and kind of system.
* User Identification::     Finding the name and user id of the user.
* Time of Day::             Getting the current time.
* Time Conversion::         Converting a time from numeric form to 
                              calendrical data and vice versa.
* Time Parsing::            Converting a time from numeric form to text
                              and vice versa.
* Processor Run Time::      Getting the run time used by Emacs.
* Time Calculations::       Adding, subtracting, comparing times, etc.
* Timers::                  Setting a timer to call a function at a
                              certain time.
* Idle Timers::             Setting a timer to call a function when Emacs has
                              been idle for a certain length of time.
* Terminal Input::          Accessing and recording terminal input.
* Terminal Output::         Controlling and recording terminal output.
* Sound Output::            Playing sounds on the computer's speaker.
* X11 Keysyms::             Operating on key symbols for X Windows.
* Batch Mode::              Running Emacs without terminal interaction.
* Session Management::      Saving and restoring state with
                              X Session Management.

Starting Up Emacs

* Startup Summary::         Sequence of actions Emacs performs at startup.
* Init File::               Details on reading the init file.
* Terminal-Specific::       How the terminal-specific Lisp file is read.
* Command-Line Arguments::  How command-line arguments are processed,
                              and how you can customize them.

Getting Out of Emacs

* Killing Emacs::           Exiting Emacs irreversibly.
* Suspending Emacs::        Exiting Emacs reversibly.

Terminal Input

* Input Modes::             Options for how input is processed.
* Recording Input::         Saving histories of recent or all input events.

Tips and Conventions

* Coding Conventions::      Conventions for clean and robust programs.
* Key Binding Conventions:: Which keys should be bound by which programs.
* Programming Tips::        Making Emacs code fit smoothly in Emacs.
* Compilation Tips::        Making compiled code run fast.
* Warning Tips::            Turning off compiler warnings.
* Documentation Tips::      Writing readable documentation strings.
* Comment Tips::            Conventions for writing comments.
* Library Headers::         Standard headers for library packages.

GNU Emacs Internals

* Building Emacs::          How the dumped Emacs is made.
* Pure Storage::            A kludge to make preloaded Lisp functions sharable.
* Garbage Collection::      Reclaiming space for Lisp objects no longer used.
* Memory Usage::            Info about total size of Lisp objects made so far.
* Writing Emacs Primitives::  Writing C code for Emacs.
* Object Internals::        Data formats of buffers, windows, processes.

Object Internals

* Buffer Internals::        Components of a buffer structure.
* Window Internals::        Components of a window structure.
* Process Internals::       Components of a process structure.
@end detailmenu
@end menu

@c include intro.texi
@c include objects.texi
@c include numbers.texi
@c include strings.texi

@c include lists.texi
@c include sequences.texi
@c include hash.texi
@c include symbols.texi
@c include eval.texi

@c include control.texi
@c include variables.texi
@c include functions.texi
@c include macros.texi

@c include customize.texi
@c include loading.texi
@c include compile.texi
@c include advice.texi

@c This includes edebug.texi.
@c include debugging.texi
@c include streams.texi
@c include minibuf.texi
@c include commands.texi

@c include keymaps.texi
@c include modes.texi
@c include help.texi
@c include files.texi

@c include backups.texi

@c ================ Beginning of Volume 2 ================
@include buffers.texi
@include windows.texi
@include frames.texi

@include positions.texi
@include markers.texi
@include text.texi
@include nonascii.texi

@include searching.texi
@include syntax.texi
@include abbrevs.texi
@include processes.texi

@include display.texi
@include os.texi

@c MOVE to Emacs Manual:  include misc-modes.texi

@c appendices

@c  REMOVE this:  include non-hacker.texi

@include anti.texi
@include doclicense.texi
@include gpl.texi
@include tips.texi
@include internals.texi
@include errors.texi
@include locals.texi
@include maps.texi
@include hooks.texi

@include index.texi

@ignore
@node New Symbols, , Index, Top
@unnumbered New Symbols Since the Previous Edition

@printindex tp
@end ignore

@bye

\f
These words prevent "local variables" above from confusing Emacs.

@ignore
   arch-tag: dfdbecf8-fec2-49c1-8427-3e8ac8b0b849
@end ignore