Edimax Technology IC-1520POE - Manual (Page 23)

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NOTE: When you change any setting(s) listed above, please click ‘Apply’
button so the change(s) will take effect.
Zoom Controls These buttons can change the zoom rate of IP camera:
Zoom in (see more details about a certain place)
Zoom out (see more things which camera can get)
Full view (see everything which camera can get)
Example:
Click full view button to see everything camera can get: