As i find myself lost in what ive done each time i start fusion and start looking at my parts .. it can just be a visibilit toggle then i go for a coffee and then back and when i close the document i cant for my life remember if i changed anything or not. So a timeline for changes since open or changes since last save or some kind of highlighting of what has been changed since the last open/save so one can review what has been done before closing and saving so not to save just some visibility toggle or stuff like that.
in this example an extra timeline is under the original, where only the edited/new features will apear, the upper timeline is the timeline from last save/open of the file. Would make it alot easier to find what has been changed.
Ofc it could be flipped also so the edited/added features are above the original timeline 😃