You can choose a solid background, or one of the following gradients: Top-Bottom, Left-Right, or Diagonal.

Select from the menu of colors or click the palette icon to open a separate window with a color map. To select a color from the colormap, move the crosshairs to the desired color, and use the sliding arrow on the right to select the desired shade. Clicking on a blank square under User colors will make the specified color an option. Click on the desired color square and click Apply to select it as the Background color.

A second background color can be selected to form gradients along with the first Background Color.