number you specify is whether it is greater than zero.)
@item screen-gamma
+@cindex gamma correction
If this is a number, Emacs performs ``gamma correction'' on colors. The
value should be the screen gamma of your display, a floating point
number. Usual PC monitors have a screen gamma of 2.2, so the default is
The number of lines to use for the toolbar. A value of @code{nil} means
don't display a tool bar.
+@item line-spacing
+Additional space put below text lines in pixels (a positive integer).
+
@ignore
@item parent-id
@c ??? Not yet working.