I would highly recommend a feature just like in normal beatmapping mode where you can change the background dimness so you can see the notes more clearly. When i go to test new maps and when i try to practise parts of a song that i wanna learn i cannot because i cant see what im doing because im so used to the background dimness being set at 100%. Would highly love and appriciate a feature which could do so. I've seen many others think about this being implemented and they think it would also be a great addition to a great game.