Hi guys, I have a 37 PV500 and I got 2 things to ask: 1. Is there any button on the remote control, which can be used to toggle between present and last viewed channel? Sometimes it marked as Return button on some remote controls. Does it exist on TH37PV500 remote? 2. The picture doesnt seem to be center; its kinda left aligned. Does anybody know how to center the position? Thanx in advance for your time.