DVR systems WatchNET Software - Manual (Page 125)

NDVR Server Manual
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Also, when you double click one window to zoom in it, other cameras will
be displayed on the second monitor. When all the cameras are shown on the
main monitor, no camera will be displayed on the second one.
Operation
You can single –right-click on both main monitor and second monitor to do
full screen display, instant playback, OSD adjustment, send to TV monitor and
read IP register information.
The operations are the same with single monitor. For details, please refer
to our NDVR user manual.
Enter Playback
Display