Q-See QSD6204 User Manual page 41

Button functions:
1.PTZ Control
2.Zoom in, Zoom Out
3.HDD Play Mode
4.File Play Mode
5.Net Play Mode
6.Event List
7.Control Panel
8.Remote Login
9.Change Storage Device
10.Capture Image
11.Record
12.Search
13.Reverse
14.Record
15.Stop
16.Pause
17.Play
18.Forward
19.Playback Slider
20.Audio Slider
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