Operation Manual
User Manual of Digital Video Recorder 
102 
6.2  Auxiliary Functions of Playback 
6.2.1  Playing Back Frame by Frame 
Purpose: 
Play video files frame by frame, in order to check image details of the video when abnormal events happen. 
Steps: 
•  Using a Mouse 
Go to Playback interface and click button    until the speed changes to Single frame. One click on the 
playback screen represents playback or adverse playback of one frame. It is also feasible to use button   
in toolbar. 
•  Using the front panel (Not supported by DS-7100-SH and DS-7200HGHI-SH) 
Press the   button to set the speed to Single frame. One click on the playback screen or press   button 
on the front panel represents playback or adverse playback of one frame. 
6.2.2  Digital Zoom 
Steps: 
1.  Click the   button on the playback control bar to enter Digital Zoom interface. 
2.  Use the mouse to draw a red rectangle and the image within it will be enlarged up to 16 times. 
Figure 6. 18 Draw Area for Digital Zoom 
3.  Right-click the image to exit the digital zoom interface. 
6.2.3  Reverse Playback of Multi-channel 
Purpose: 
You can play back record files of multi-channel reversely. Up to 16-ch simultaneous reverse playback is 










