AVer AndroidViewer - Manual (Page 21)

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10. Select button can snapshot the current video screen and save on your mobile phone.
11. Select button will return to Live mode.
12. Select button to display POS information on channel screen.
 Playback by Event
1. Run AVer Viewer.
2. In main screen, select DVR/NVR.
3. Select the NVR/DVR server to connect it.
13. After connecting to DVR/NVR server, select button and select button.