Test the motion zones when configuring

When trying to decide if a motion zone needs to be set to #2, #5, #9, etc, it would be helpful if the preview on the motion settings tab, would indicate where motion is being detected with a highlight or outline or something.

I have seen some DVRs implement a test button that puts a live number grid over the preview showing motion levels in each block of the grid and then changes those numbers to yellow or red when the motion exceeds the threshold setting to trigger a record event.