Before anyone yells at me, I did search through the forum and most of the burn in threads, but I couldn't find out how long the "white bar scroll" or the inverted image (both on Panny 42PWD6UY), should be left on to have an effect. Just to be on the safe side, I like to run one of these modes after I watch a some 2.35:1 DVD's to prevent image retention or possibly even burn-in if it works. But I don't know how long to leave the mode on since the manual doesn't give any suggestions; so is it like 1 min, 15 mins, 1 hr? Just need to know a range. Thanks.