I’m trying to flip a polygon ROI shape about the horizontal axis to create a mirrored shape. My goal is to measure an image of a symmetrical region so I would like to duplicate the free-hand polygon shape for both sides (with the same area). As a follow-up, is the intensity measurement (Analyze -> Measure) taken in units/area? If mirroring the shape is not possible, then maybe the area of the shape doesn’t matter if the measurement is normalized by area. The same shape would still be ideal!