Show where motion was detected (re false alerts)

Sometimes, even with advanced motion detection and customized motion zones, I get false alerts. I watch the video and there is absolution no motion within my motion zones. I would like a way, during playback of the video, to be able to "see" where in the video it was that caused motion to be detected. Then maybe I can adjust the motion zones. Right now I get way too many false alerts and I have no idea where the camera is detecting motion. Maybe have the spot(s) where motion was detected optionally be able to flash white.