Fill

To fill a selected area or an entire layer, do the following:

Choose a foreground or background color.
Select the area you want to fill. To fill an entire layer, select the layer in the Layers panel.
Click on "Colors - Fill" on the user menu to fill a selection or layer. A dialog box will appear in which you can choose the color.

The following colors are available: White, Foreground Color, Background Color, Transparent and any color that you can choose from the dialog box.