Version 220.127.116.11 of SplitCam allowed one to capture a portion of a computer screen and use it with other applications. That feature was eliminate in version 9 and now in version 10. I wish SplitCam would return that option to their program as I find using either full screen capture or Window capture to not be an acceptable replacement.
We added this function to version 10
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When you add media layers/ screen share after go to setting of this layer and choose there select region (its capture of region)