DVR systems NVR60xx Series - Manual (Page 94)

6.2.3 Reverse Playback of Multi-channel
Purpose:
You can play back record files of multi-channel reversely. Up to 16-ch (with 1280*720 resolution) simultaneous
reverse playback is supported; up to 4-ch (with 1920*1080P resolution) simultaneous reverse playback is
supported and up to 1-ch (with 2560*1920 resolution) reverse playback is supported.
1. Enter Playback interface.
Menu>Playback
2. Check more than one checkboxes to select multiple channels and click to select a date on the calendar.
Figure 6. 23 4-ch Synchronous Playback Interface
3. Click to play back the record files reversely.