Some mildly annoying stuff

So when I was time trialling Wii Mushroom Gorge by Keqing, I had to make sure to charge up a mini turbo and release it at the edge, so I could take the beginning shortcut without using mushrooms. It was super annoying to do because every time you finish a lap, the time and stuff will flash on your screen. It was really hard to see what I was doing, so I wish you could toggle the flash or change the duration. This is really small because it's a whole bunch of yap

I also wish you could erase zones (and also whatever else you draw but can't erase); if you make a mistake you have to start over (if there is a way please let me know)