background colors for the current frame only; see @ref{Frame
Parameters}.)
+ If you want to alter the appearance of all Emacs frames, you need to
+customize the frame parameters in the variable
+@code{default-frame-alist}; see @ref{Creating Frames,
+default-frame-alist}.
+
Emacs can correctly display variable-width fonts, but Emacs commands
that calculate width and indentation do not know how to calculate
variable widths. This can sometimes lead to incorrect results when