User`s manual

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2.6 Audio
Audio volume controls for speaker and microphone. Clicking on the icon will
mute or enable.
2.7 Control (PTZ Control)
The PTZ control panel will not be present in those models where PTZ will not be
used (e.g. EV8580). Use the Set Preset button to mark a preset, and the Go to
Preset button to use a preset.
EV8280 Control
The EV8280 speed dome camera has some additional PTZ controls displayed in
the Control panel. For more information about the EV8280’s PTZ functionality,
see the section EV8280 PTZ Control Settings.