@node Management Parameters
@subsubsection Window Management Parameters
-
+
These frame parameters, meaningful only on window system displays,
interact with the window manager.
@defvar frame-title-format
This variable specifies how to compute a name for a frame when you have
not explicitly specified one. The variable's value is actually a mode
-line construct, just like @code{mode-line-format}. @xref{Mode Line
+line construct, just like @code{mode-line-format}, except that the
+@samp{%c} and @samp{%l} constructs are ignored. @xref{Mode Line
Data}.
@end defvar
@defvar selection-coding-system
This variable specifies the coding system to use when reading and
-writing selections, the clipboard, or a cut buffer. @xref{Coding
+writing selections or the clipboard. @xref{Coding
Systems}. The default is @code{compound-text-with-extensions}, which
converts to the text representation that X11 normally uses.
@end defvar
On a character terminal, it gives the height in characters.
@end defun
-@defun display-mm-height &optional display
-This function returns the height of the screen in millimeters,
-or @code{nil} if Emacs cannot get that information.
-@end defun
-
@defun display-pixel-width &optional display
This function returns the width of the screen in pixels.
On a character terminal, it gives the width in characters.
@end defun
+@defun display-mm-height &optional display
+This function returns the height of the screen in millimeters,
+or @code{nil} if Emacs cannot get that information.
+@end defun
+
@defun display-mm-width &optional display
This function returns the width of the screen in millimeters,
or @code{nil} if Emacs cannot get that information.
@end defun
+@defvar display-mm-dimensions-alist
+This variable allows the user to specify the dimensions of graphical
+displays returned by @code{display-mm-height} and
+@code{display-mm-width} in case the system provides incorrect values.
+@end defvar
+
@defun display-backing-store &optional display
This function returns the backing store capability of the display.
Backing store means recording the pixels of windows (and parts of