You need to be playing a 4way game for the option to show in the menu or else it will be hidden. Run a game like pacman then the option will appear.

@churchill7 in mame2003-plus and mame2003 this core option will be hidden unless you're playing a game that uses the feature. I recommend running pacman then going into the core options.

https://github.com/libretro/mame2003-libretro/blob/7ea22d44c0d899cf7670d458cd6dac0942839d2d/src/mame2003/mame2003.c#L187

The default is probably decent though like you observed in Tron.

@chupa38 ya those third party images put so much in to make it look all pretty and cool. But they are so far off from the base RetroPie. I’ve decked out my RetroPie builds, but I did it all myself. I had to learn how all the pieces fit. If something is wrong, I know what I’ve done. If you start with base retro pie And just want to play games, that may be your best bet. It may not look very pretty and flashy, but functions rock solid. And when your curiosity peaks, you can seek out here on how to customize your build the way you want. And go as far as your willing to learn.