Dahua NVR21-4KS3 Series User Manual page 219

The following figure is for reference only.
No. Function
1 Display window
Playback controls bar
Clip
2
Backup
Figure 5-88 Search
Table 5-26 Search page description
Description
Display the searched recorded video or picture. The system
supports playing in single-channel, 4-channel, 9-channel,
and 16-channel simultaneously.
When playing back in the single-channel mode, hold down
the left mouse button to select the area that you want to
enlarge. The area is enlarged after the left mouse button is
released. To exit the enlarged status, right-click the image.
Playback control buttons.
Click to clip the recording file and then save the
footage. See "5.8.2.6 Clipping Videos" for details.
Click to back up recordings.
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User's Manual