HTC DROID Incredible - Manual (Page 90)

Keyboard
Using the onscreen keyboard
When you start a program or select a field that requires text or
numbers, the onscreen keyboard becomes available.
Using the landscape onscreen keyboard
When entering text, you can choose to use the landscape orientation
of the onscreen keyboard. Turn the phone sideways to use a larger
keyboard that lets you type easily using two thumbs.
The Auto-rotate screen check box in HOME > MENU > Settings
> Display needs to be selected for the screen orientation to
automatically change.
The landscape orientation keyboard is not supported in all
applications.

