9.Press MENU. Then press 
or 
until SET CONTRAST appears. Press ENTER to set the contrast. Use 
or 
to set the contrast. There are 8 choices available. Press ENTER to exit to idle screen.
10.Press MENU. Then press 
or 
until BACK LIGHT appears. Press ENTER. The display will show BACK LIGHT TIME. Press ENTER. The display will show the back light time. Use 
or 
to select between 30 sec, 20 sec, 10 sec or OFF. Press ENTER. The display will show BACK LIGHT TIME. Press 
or 
. The display will show OFF HOOK LIGHT. Press ENTER. The display will show the light time. Use 
or 
to toggle between FOR SECONDS (The light will remain on for the backlight time) or ALL THE TIME (The light will remain constantly on). Press ENTER. Press
MENU.
NOTE: Backlighting will only function if the AC adapter is connected.
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