A7Control Panel FunctionsControl FunctionMENU ButtonUse this button to enter or exit from the On Screen Display.DSUB and DVI input,use this button to enter EZZOOMING,4:3 IN WIDE,PHOTO EFFECTitems.HDMI input,use this button to enter 4:3 IN WIDE,PHOTO EFFECT,VOLUMEitems.For more information,refer to page A16 -A17 .OSD LOCKED/UNLOCKEDThis function allows you to lock the current control settings, sothat these settings are not inadvertently changed. To lock theOSD settings, press and hold the MENU buttonfor s...