Apple iPhone 4G - Manual (Page 30)

Your most recently used apps appear at the bottom of the screen, in order starting
from the left. Flick to see more apps.
Switch to another app: Tap an app in the recents list.
Remove an app from the recents list: Touch and hold the app icon until it begins to
jiggle, then tap . Removing an app from the recents list also forces it to quit.
The app is added to recent apps again the next time you open it.
Scrolling
Drag up or down to scroll. On some screens such as webpages, you can also scroll side
to side.
Dragging your finger to scroll won’t choose or activate anything on the screen.
30 Chapter 3 Basics