Dahua NVR21-4KS3 Series User Manual page 152

You can adjust the searching area. Make sure that there are less than 30 faces in the
selected range.
Step 3 Select the target face that you want to search for. You can select maximum 8 target faces.
Step 4 Click Search. The search results are displayed.
Related Operations
● Play video.
Select the picture and then click
the snapshot. During playback, you can
Figure 5-18 Draw a searching range
Figure 5-19 Picture search results
to play back the video within 10 seconds before and after
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User's Manual