Hello,
I wish there was a history of what was changed on the car you were working on incase you forget what you did, or if something went wrong.
There is a feature for that in the engine designer. “Hold” and “revert” buttons to store and undo any changes you made if you’re not happy with your tuning. I can’t remember if other sections have it or not.
The trims have it as well for the suspension and gearbox tabs.