Planar LA1710RTR - Manual (Page 17)

On-Screen Display Menus On-Screen Display Menus On-Screen Display Menus On-Screen Display Menus On-Screen Display Menus
Third OSD Menu:
14
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Volume Volume Volume Volume Volume
It allows the sound volume.
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Mute Mute Mute Mute Mute
It allows you to disable the sound immediately.
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Input Select Input Select Input Select Input Select Input Select
It allows you the chosse the input signal.