Options - Appearance

Tab

Tab size, alignments, colors, font, etc.

Tab skins

Skins for tab background, close button, and lock icon are here.

You can find many skin images that contributors have uploaded on the server.
Of course you can upload and publish your own image files.

Sizing Margins
For skin images that can be grown or shrunk such as tab background, you have to specify Sizing Margins unique to the skin.
It consists of 4 values, which indicate pixel size of fixed corner areas in the image file.

Toolbar

Color and image settings common to all toolbars.

Menu

Menu style and fonts.

Folder View

You can change background and text color, depending on whether a View has focus.

Navigation Pane

Background and text color.