PCI CS-TX04F, Руководство пользователя

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7.5 Zoom-in / Zoom-out
For cameras that support zoom-in / zoom-out function, you can use this
function to see 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 the 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).