Harman Kardon AVR 254 Owner's Manual page 10

FRONT-PANEL CONNECTIONS
Audio Effects:
Press this button to directly access the Audio Effects
submenu, which allows adjustment of the tone and other controls.
See the Initial Setup section for more information.
Video Modes:
Press this button for direct access to the Video Modes
submenu, which contains settings that may be used to improve the
picture if necessary after you have adjusted the picture settings using
the video display or TV.
OK:
Press this button to select the currently highlighted item.
Back/Exit:
Press this button to return to the previous menu, or
to exit the menu system.
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