Aposonic A-S0804R3 - Manual (Page 20)

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ZOOM Key again can disable digital zoom function. Using the panel key to perform
zoom in function is fixed at 2 times.)
D. PTZ CONTROLLER
Within live-viewing mode, Clicks this button to get into the PTZ setup menu. User
can also use PTZ key on the front panel to perform this function. Moreover, user can
right-click the button of the mouse or press the PTZ key on the front panel again to
exit PTZ Setup.
NOTE： Only for the camera supported PTZ function.