Planar PD42ED - Manual (Page 27)

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Advanced Settings
PC Video
This menu will also allow user to enter advance mode and change DPMS
setting.
When under Video mode, user can set up V-Chip and Closed Caption.
PC Video
When under PC mode, Signal Format will display Resolution,
Horizontal/Vertical Frequency, PIP Video Source, and PIP Video Format.
When under Video mode, Signal Format will display Main Signal Source, Main
Signal Format, and PIP Video Source.