Palm Pre - Manual (Page 56)

56 Section 2B: Move Around on Your Phone
Display All Open Applications (Card View)
Card view displays open applications as small cards, so that you can easily scroll through
them and drag them to change their order.
ⅷ
When an application fills the screen and you want to go to Card view, press Center .
Tip You can also open Card view by flicking up from the gesture area to the
screen.