Performance Series Network Video Recorder User Guide 
 
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When you play back video record, you can mark the video record when there is important 
information. After the playback, you can search the corresponding record by time or the mark 
key words and then play it. It is very easy for you to get the important video information.  
Add Mark 
During the playback, click   and the following window is displayed: 
Figure 12-114 Add Mark 
 
Click OK.  
Playback Mark  
During 1-window playback mode, click   on the Playback window (Figure 
12-110), you can go to mark file list interface. Double click one mark file, you can begin 
playback from the mark time. 
Figure 12-115 Mark List 
 
Play before mark time 
Here you can set to begin playback from previous N seconds of the mark time.