By default, the color of the main drawing window is white. You can select a different color if you like. Note, however, that selecting a different background color can make some elements difficult to see depending on their color settings.
To change the background color of the drawing window:
Select Settings > Toolbars.
Click the colored box next to the Background option.
In the Color dialog, select or create the desired color for your drawing area, then click OK to return to the Program Settings dialog.
Click OK.