Press this button for some basic help with the use of this dialog.
Click in this rectangle to preview this texture on your desktop. It will not be installed, and when you quit, your desktop will revert to its original state.
Use this button to advance to the next texture. If you advance beyond the last texture, you will return to the first.
Use this button to step backward to the previous texture (or the last texture, if this is the first).
Press this button to install the texture on your desktop. The texture will remain on your desktop until you choose to install another one.