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(8) Mask
Mark an area on the screen to disregards the motion in the marked area and to only monitor outside
the marked area. Enable the Enable Mask and click-and-drag an area on screen that user wants to
mask. To clear all mask area, click Clear button. To inverse the mask area, click Invert button. The
original selected area will exchanged with un-selected area. To show the mask area on preview
screen, enable Show Mask. The mask is able to see on the screen only when preview screen is in
single screen mode
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