Epson EMP 9000 - SXGA LCD Projector Owner's Manual page 66

Button Function
Sync +/- Synchronize the computer's graphic signal.
Use these buttons to adjust an overall image that is
fuzzy or streaked, or to select menu items during
menu operations.
Tracking +/- Match the projectos's internal clock to various
computer graphic signals (tracking adjustment).
Use these buttons to adjust an image with vertical
fuzzy lines, or to change numeric settings during menu
operations.
Enter Selects a menu option.
If you press the Enter button when a menu or help is
displayed, you can access to the next menu layer.
If you press the Enter button when a menu or help is
not displayed, you can optimize the computer image.
A/V mute Turns off/on the audio/videio output of the projector.
To turn on the audio/video output, press the A/V mute
button again, or either the Esc or the Volume button.
Resize Switches the resolution to the Window display or
Resize display.
Shift Pressing the shift and keystone button at the same
time can increase or decrease the sound volume.
Keystone +/- Adjust the keystone.
Controlling the Projector 45