can customize some of the same aspects using the system registry.
@xref{MS-Windows Registry}.
-o When Emacs is built using an ``X toolkit'', such as Lucid or
+ When Emacs is built using an ``X toolkit'', such as Lucid or
LessTif, you need to use X resources to customize the appearance of
the widgets, including the menu-bar, scroll-bar, and dialog boxes.
This is because the libraries that implement these don't provide for
Programs running under the X Window System organize their user
options under a hierarchy of classes and resources. You can specify
-default values for these options in your X resources file, usually
-named @file{~/.Xdefaults} or @file{~/.Xresources}.
-If changes in @file{~/.Xdefaults} do not
-take effect, it is because your X server stores its own list of
-resources; to update them, use the shell command @command{xrdb}---for
-instance, @samp{xrdb ~/.Xdefaults}.
-
- Each line in the file specifies a value for one option or for a
-collection of related options, for one program or for several programs
-(optionally even for all programs).
+default values for these options in your @dfn{X resource file},
+usually named @file{~/.Xdefaults} or @file{~/.Xresources}. Changes in
+this file do not take effect immediately, because the X server stores
+its own list of resources; to update it, use the command
+@command{xrdb}---for instance, @samp{xrdb ~/.Xdefaults}.
@cindex Registry (MS-Windows)
- MS-Windows systems do not support @file{~/.Xdefaults} files, so
-instead Emacs compiled for Windows looks for X resources in the
-Windows Registry, first under the key
-@samp{HKEY_CURRENT_USER\SOFTWARE\GNU\Emacs} and then under the key
+ (MS-Windows systems do not support X resource files; on Windows,
+Emacs looks for X resources in the Windows Registry, first under the
+key @samp{HKEY_CURRENT_USER\SOFTWARE\GNU\Emacs} and then under the key
@samp{HKEY_LOCAL_MACHINE\SOFTWARE\GNU\Emacs}. The menu and scroll
bars are native widgets on MS-Windows, so they are only customizable
via the system-wide settings in the Display Control Panel. You can
-also set resources using the @samp{-xrm} command line option (see
-below.)
-
-@iftex
- Applications such as Emacs look for resources with specific names
-and their particular meanings. Case distinctions are significant in
-these names. Each resource specification in @file{~/.Xdefaults}
-states the name of the program and the name of the resource. For
-Emacs, the program name is @samp{Emacs}. It looks like this:
+also set resources using the @samp{-xrm} command line option, as
+explained below.)
-@example
-Emacs.borderWidth: 2
-@end example
-@end iftex
-@ifnottex
- Programs define named resources with particular meanings. They also
-define how to group resources into named classes. For instance, in
-Emacs, the @samp{internalBorder} resource controls the width of the
-internal border, and the @samp{borderWidth} resource controls the width
-of the external border. Both of these resources are part of the
-@samp{BorderWidth} class. Case distinctions are significant in these
-names.
-
- Every resource definition is associated with a specific program
-name---the name of the executable file that you ran. For Emacs, that
-is normally @samp{emacs}. To specify a definition for all instances
-of Emacs, regardless of their names, use @samp{Emacs}.
-
- In @file{~/.Xdefaults}, you can specify a value for a single resource
-on one line, like this:
+ Each line in the X resource file specifies a value for one option or
+for a collection of related options. Each resource specification
+consists of a @dfn{program name} and a @dfn{resource name}. Case
+distinctions are significant in each of these names. Here is an
+example:
@example
emacs.borderWidth: 2
@end example
-@noindent
-Or you can use a class name to specify the same value for all resources
-in that class. Here's an example:
+@ifnottex
+ The program name is the name of the executable file to which the
+resource applies. For Emacs, this is normally @samp{emacs}. To
+specify a definition that applies to all instances of Emacs,
+regardless of the name of the Emacs executable, use @samp{Emacs}.
+
+ The resource name is the name of a program setting. For instance,
+Emacs recognizes a @samp{borderWidth} resource that controls the width
+of the external border for graphical frames.
+
+ Resources are grouped into named classes. For instance, the
+@samp{BorderWidth} class contains both the @samp{borderWidth} resource
+(which we just described), as well as the @samp{internalBorder}
+resource, which controls the width of the internal border for
+graphical frames. Instead of using a resource name, you can use a
+class name to specify the same value for all resources in that class.
+Here's an example:
@example
emacs.BorderWidth: 2
If you specify a value for a class, it becomes the default for all
resources in that class. You can specify values for individual
-resources as well; these override the class value, for those particular
-resources. Thus, this example specifies 2 as the default width for all
-borders, but overrides this value with 4 for the external border:
+resources as well; these override the class value, for those
+particular resources. The following example specifies 2 as the
+default width for all borders, but overrides this value with 4 for the
+external border:
@example
emacs.BorderWidth: 2
Also, command-line options always override the X resources file.
@ifnottex
-Here is a list of X command-line options and their corresponding
-resource names.
+ The following X command-line options affect how X resources are
+processed:
@table @samp
@item -name @var{name}
@opindex --name
@itemx --name=@var{name}
@cindex resource name, command-line argument
-Use @var{name} as the resource name (and the title) for the initial
-Emacs frame. This option does not affect subsequent frames, but Lisp
-programs can specify frame names when they create frames.
+This option sets the program name of the initial Emacs frame to
+@var{name}. It also sets the title of the initial frame to
+@var{name}. This option does not affect subsequent frames.
If you don't specify this option, the default is to use the Emacs
-executable's name as the resource name.
+executable's name as the program name.
+
+For consistency, @samp{-name} also specifies the name to use for other
+resource values that do not belong to any particular frame.
+
+The resources that name Emacs invocations also belong to a class,
+named @samp{Emacs}. If you write @samp{Emacs} instead of
+@samp{emacs}, the resource applies to all frames in all Emacs jobs,
+regardless of frame titles and regardless of the name of the
+executable file.
@item -xrm @var{resource-values}
@opindex --xrm
@itemx --xrm=@var{resource-values}
@cindex resource values, command-line argument
-Specify X resource values for this Emacs job (see below).
+This option specifies X resource values for the present Emacs job.
+
+@var{resource-values} should have the same format that you would use
+inside a file of X resources. To include multiple resource
+specifications in @var{resource-values}, put a newline between them,
+just as you would in a file. You can also use @samp{#include
+"@var{filename}"} to include a file full of resource specifications.
+Resource values specified with @samp{-xrm} take precedence over all
+other resource specifications.
@end table
-
- For consistency, @samp{-name} also specifies the name to use for
-other resource values that do not belong to any particular frame.
-
- The resources that name Emacs invocations also belong to a class; its
-name is @samp{Emacs}. If you write @samp{Emacs} instead of
-@samp{emacs}, the resource applies to all frames in all Emacs jobs,
-regardless of frame titles and regardless of the name of the executable
-file. Here is an example:
-
-@example
-Emacs.BorderWidth: 2
-Emacs.borderWidth: 4
-@end example
-
- You can specify a string of additional resource values for Emacs to
-use with the command line option @samp{-xrm @var{resources}}. The text
-@var{resources} should have the same format that you would use inside a file
-of X resources. To include multiple resource specifications in
-@var{resources}, put a newline between them, just as you would in a file.
-You can also use @samp{#include "@var{filename}"} to include a file full
-of resource specifications. Resource values specified with @samp{-xrm}
-take precedence over all other resource specifications.
+@end ifnottex
One way to experiment with the effect of different resource settings
-is to use the @code{editres} program. Select @samp{Get Tree} from the
-@end ifnottex
-@iftex
- You can experiment with the effect of different resource settings
-with the @code{editres} program. Select @samp{Get Tree} from the
-@end iftex
-@samp{Commands} menu, then click on an Emacs frame. This will display
-a tree showing the structure of X toolkit widgets used in an Emacs
-frame. Select one of them, such as @samp{menubar}, then select
-@samp{Show Resource Box} from the @samp{Commands} menu. This displays
-a list of all the meaningful X resources for that widget, and allows
-you to edit them. Changes take effect when you click on the
-@samp{Apply} button. (See the @code{editres} man page for more
-details.)
+is to use the @code{editres} program. See the @code{editres} man page
+for more details.
@node Table of Resources
@appendixsec Table of X Resources for Emacs
@end ifnottex
@item @code{font} (class @code{Font})
-Font name (or fontset name, @pxref{Fontsets}) for @code{default} font.
+Font name for the @code{default} font. @xref{Font X}. You can also
+specify a fontset name (@pxref{Fontsets}).
+
+@item @code{fontBackend} (class @code{FontBackend})
+The backend(s) to use for drawing fonts; if multiple backends are
+specified, they must be comma-delimited and given in order of
+precedence. On X, for instance, the value @samp{x,xft} tells Emacs to
+draw fonts using the X core font driver, falling back on the Xft font
+driver if that fails. Normally, you can leave this resource unset, in
+which case Emacs tries using all font backends available on your
+graphical device.
@item @code{foreground} (class @code{Foreground})
Color name for text.