Polycom 55" LED DISPLAY, Owner'S Manual

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“Left/Right” keys
Brightness.
which is optimized (and recommended) for use with POLYCOM video conferencing systems
(and is applicable to all video inputs). As such, many of the adjustment sub-settings are “grayed-out”
and are not accessible to the user. In order to make adjustments to these settings, “CUSTOM”
picture mode must be selected.
Note that the default Picture Mode setting is set to “POLYCOM”. This setting is standard mode,
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