I just did some tests and the culprit seems to be my 4K TV screen. I've got no problem on my 1440p PC monitor.

@KingOfGamer1996 This is only supported on other retro systems like Batocera and Recalbox.

@mitu success - I'm now in. Thank you so much for your help - much appreciated and sorry for my daft questions

@thestarglider My pleasure mate, I'm glad I could help :)

Hey guys, yes I like that one too thanks @Stuart2773 but it sounds too much like the snes classic menu as I have the original on my Nintendo build already. I do like the one @Clyde posted but only like the start of it, I might have a play and crop and loop before it all starts going crazy haha.