Adjustments are not usable on re-start, so you must start over in most cases. If you make an adjustment while in "Auto" mode, the changes don't stick after you quit and then reopen Webcam Settings. If you make changes in "Manual" mode, it again just resets everything to default and back to Auto mode after restarting Webcam Settings. If you make adjustments in "Manual" mode, quit FaceTime, but leave Webcam Settings open, then reopen FaceTime, the picture goes nearly black and again, you must start over. The only combination that sort of works is leaving Webcam Settings running all the time and in Auto mode. Even then, it is buggy and, of course, you have less adjustablility than in Manual mode. Also, FYI, it has almost no control over a Logitech Orbit AF. (Tested with both the built-in cam on a 2011 iMac and with the Logitech.) This was my experience. YMMV.