Background. Select the type of background.
Solid fill color. Select this option to fill the contact sheet background with a solid color.
Load from file. Select this option to specify a graphics file as the contact sheet background. If the file is smaller than half the dimensions of the contact sheet, it will be tiled. Otherwise, it will be stretched to fill the sheet. You can use the [...] button to browse for the desired graphics file.
Borders. Select the type of borders for the thumbnails.
None. Select this option to have NO border drawn around each contact sheet thumbnail.
Simple. Select this option to have a simple (flat) border drawn around each contact sheet thumbnail. Use the Line color button to select the color for the borders.
Sunken. Select this option to have a sunken (3D) border drawn around each contact sheet thumbnail.
Interior fill. Use the button to select a color for filling the interior of the thumbnail boxes on the contact sheet.
Don't fill. Select this option to place the border around the thumbnail itself, rather than around the area reserved for it.