Danbit H.264 DVR User Manual page 38

F. Mask Setup
The masked area will not show both in the live view and playback
recording.
F-1. Area1
Tick the "Area1" box and click "Area Setup" to drag a blue area for masking.
F-2. Area2
Tick the "Area1" box and click "Area Setup" to drag a green area for masking.
F-3. Area3
Tick the "Area1" box and click "Area Setup" to drag a red area for masking.
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