Background Color
You can choose
any background color
of your choice. The default background is white. To choose
a new background color, go to menu Tools->Options (or
double-click on a empty draw area) to bring up the general options window, and
select a new background color.
If you don't see the background color you
chose, it may be because of the presence of a background image. (See Background Image to know how to remove the
background image.)