Nikon D90 Manuals page 18

Multi selector is used to navigate the menus and move between images during playback.
Live View button for activating live view mode.
AE-L/AF-L button is used to lock the autofocus and/or auto exposure readings.
SHOOTING INFORMATION DISPLAY
Press the button to display this info.
Exposure Mode
Battery Power
Metering Mode
Flash Mode
Autofocus Area Mode
& Focus Points
Image Size
Image Quality
Long Exposure
Noise Reduction
High ISO
Noise Reduction
CONVENIENT FEATURES
In-camera help
When you're changing a setting in a menu or accessing the settings at the bottom of the shooting
information display there is often a question mark in the bottom left of the LCD screen. If you see
the question mark it means you can press and hold the
the setting/option you currently have selected. This can be particularly helpful if you need a quick
reminder of what a setting does.
Flash
Compensation
Shinier Speed
White Balance
Active D-Liahting
Picture Control
Setting
Exposure
Compensation
Aperture
Autofocus Mode Number of Photos
Remaining
Function Button Setting
AE-L/AF-L Function
button to display a description of
Visual Tour xvii
Release Mode
Bracketing
Indicator
Analog Exposure
Display
ISO Sensitivity
Camera beeps
when it focuses