Google Nexus One User Manual page 315

Settings
Haptic feedback
buttons and perform other actions.
SD card notifications
notifications.
Emergency tone
when you place an emergency call.
Orientation
portrait mode when you turn the phone sideways or upright.
Animation
screen.
Brightness
brightness. For the best battery performance, use the dimmest comfortable
brightness.
Screen timeout
touch the screen or press a button before the screen darkens. For the best battery
performance, use the shortest convenient timeout. Don't use the Never timeout
setting—it can drain your battery quickly and may leave a permanent image on your
screen.
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Check to have the phone vibrate briefly when you touch soft
Check to play a sound when you receive microSD card
Opens a dialog where you can configure how the phone reacts
Check to automatically switch the screen to landscape mode or
Check to enjoy animated transitions when navigating from screen to
Check to open a dialog that contains a slider for adjusting the screen
Opens a dialog where you can set how long to wait after you
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Nexus One User's Guide