(Size of Window): Document window-full-width-p.

diff --git a/lispref/windows.texi b/lispref/windows.texi
index 22bb43ecaa00a74beaf4dc3d772c146aa7e49b6c..bd8f7bc2d362c386e15d565a82c49acd14e28d12 100644 (file)
--- a/lispref/windows.texi
+++ b/lispref/windows.texi
@@ -1887,6 +1887,12 @@ If @var{window} is @code{nil}, the function uses the selected window.
 @end example
 @end defun
 
+@defun window-full-width-p &optional window
+This function returns non-@code{nil} if @var{window} is as wide as
+the frame that contains it; otherwise @code{nil}.
+If @var{window} is @code{nil}, the function uses the selected window.
+@end defun
+
 @defun window-edges &optional window
 This function returns a list of the edge coordinates of @var{window}.
 If @var{window} is @code{nil}, the selected window is used.