Dahua DH-XVR5104HS-4KL-I3 User Manual page 210

Click
Double-click on the playing page to switch between full screen playing and thumbnail
playing.
You can also do the following operations to the recorded files.
To back up the recorded files to the external storage device, select files, click Backup,

select the save path and file type, and then click Start.
To lock the files to make it unable to be overwritten, select the files, and then click Lock.

To add a mark to the file, select the files and then click Add Tag.

5.11.1.4 Video Structuring
The device can detect and extract key features from the human bodies and non-motor vehicles in the
video, and then build a structured database. You can search any target you need with these features.
5.11.1.4.1 Configuring Video Structuring
Select Main Menu > AI > Parameters > Video Structuring.
to play back the recorded video.
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Backup
User's Manual