Apple iPod touch iOS 2.1 - Manual (Page 40)

Change the browse buttons: Tap More and tap Edit, then drag a button to the
bottom of the screen, over the button you want to replace.
You can drag the buttons at the bottom of the screen left or right to rearrange them.
Tap Done when you finish. Tap More at any time to access the buttons you replaced.
40 Chapter 3 Music and Video