position as that text. This is a special case of marginal display
(@pxref{Display Margins}).
+Recursive display specifications are not supported, i.e.@: string
+display specifications that have a display specification property
+themselves.
+
@item (space-width @var{factor})
This display specification affects all the space characters within the
text that has the specification. It displays all of these spaces
You can also set the margin widths immediately.
-@defun set-window-margins window left right
+@defun set-window-margins window left &optional right
@tindex set-window-margins
This function specifies the margin widths for window @var{window}.
The argument @var{left} controls the left margin and
-@var{right} controls the right margin.
+@var{right} controls the right margin (default @code{0}).
@end defun
@defun window-margins &optional window