AVer EH1116H-4 Nano User Manual page 120

6. To switch to different camera view, select menu and select the channel.
7. The JavaViewer support PTZ control function. If the camera has
enabled PTZ function, the camera name has a word "PTZ". Using
button 2 to move PTZ camera up, 8 to move down, 4 to move to left, 6
to move to right, 7 to zoom in, 9 to zoom out, 1 to focus in, and 3 to
focus out. User also can refer to Help file for detail function control key.
Select menu and go the way down to select the Help file.
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