Have just started to play around with mame and my cab again after not touching it for almost a year. I always went to sort this out on my monitor but never got round to it. I have a 29" Pentranic mult sync (15-40khz) monitor, and have notice that i get a sort of goldfish eye effect, where the middle of the picture will be totally fine, but as you get to either edge of the screen the picture seems to bow downwards. Now i know the screen is a curved screen so it it natural for a very slight curve but this is more than that.
What options in the menu and service menu do i need to be tweaking to sort the edges out?