There are many ways of getting into the texture-browser. The most common are from the polyhedron-view or face-view when you are looking at an object and want to select a texture for it. See 'Texturing' for details on how to get to the texture-browser.

Across the top is the menu and toolbar, this is covered in more detail in the 'Menu and tool-icons' section.

Down the left of the form is a list of texture groups. The ones shown here are from Quake II, yours may differ depending on which game you are editing, and whether you have setup any additional texture groups of your own.

Most of the form is taken up with a preview of all the textures in the selected group.