Edimax Technology IC-7000PTn V3 - Manual (Page 113)

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3-7 Zoom-in / Zoom-out
For cameras that support zoom-in / zoom-out function, you can use this
function to se
e more objects that fall in the scope of camera‟s view, or enlarge
the image size of a certain object to see its detail.
Please select a camera in video displaying area by clicking on its image, then
click button to see more objects that fall in th
e scope of camera‟s view, or
click to enlarge the image size of a certain object to see its detail (Before
zoom-in, you may need to use PTZ buttons - described in next section) to find
an object you wish to see its detail).