Speco O2P30 Owner's Manual page 22

Region Of Interest
You can set and streaming the desired area on the live view window
to use ROI(Region Of Interest) function. Select Profile4(ROI-1) to
Profile7(ROI-4).
> Enable
1. Click to activate the [Region Of Interest] window. You
can add the 4 windows maximum for ROI function.
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2. Click the edge or corner of the window box to adjust the
window size.
3. Click the [Save] button to save the settings.
Note:
ROI areas can not overlap with each other.
Operation and settings