Selecting VU7+ resolution on Odroid C2


I’m fairly new to DietPi and installed it on a Odroid C2 with VU7+ touch screen attached (1024x600 resolution).
However, I wasn’t able to select this screen resolution at the LCD settings menu.

I’ve searched on the forum and according to the release notes the VU7+ settings have been inplemented in release v117.

Do I need to set is somewhere else, manually or am I overlooking something?