Thank you all for the suggestions.
Just turning on the plane is easy enough, but in an assembly with 10-50 other parts, there are often many planes that are coincident. It is possible to begin a drawing in one part based on a plane or face of another part, etc, which I often do to save time.
Overall the entire history tree system is awful IMO. Having an actual history tree in SW where I can logically stack things up and spin them open was easy. I like the rest of Fusion, but I constantly flip flop in my mind if it's worth it because the history management is so bad in Fusion.
Dragging back through a massive list of small icons at the bottom that all run together with no way to really organize them is very hard. Doing the color swipes over the top is no help to me as they still all appear totally random. The only option I see is packing them into groups, which requires you to do all edits to a given part sequentially, which isn't realistic when making assemblies w many parts based on each other.
This results in a long line of the identical icon that you can only figure what is what by hovering over it, and once you identify what group you want to mess with, it won't stay highlighted if you click something else, so you better not look away from it because your eye will forget which you had. I literally often put my finger on my monitor to hold my spot in the history markers and hope Fusion doesn't scroll it left/right on me or reset the marker to the start of the part. (Which it does many times in a given editing session and it's infuriating. I never do anything that should tell Fusion I want to scroll the history back to the start, yet that's where it goes very often, so you have to drag the little sliver of a scroll bar all the way to the right through 3 or 5 screens of little icons at the bottom, then when it hits the end at the right finally, you have to release it, then try it again because it often leaves a few icons of your most recent couple edits not showing, which is often the very edit I want to look at. It eventually shows up after bumping the slider sliver against the right side a couple times).
Then there's the micro scroll bar that almost blends in that you have to search for along the bottom of a very wide monitor, and the fact that when you right click and select "Find in Browser", about 93% of the time, nothing is actually selected in the browser along the left side - just the original part is often selected, and even at that, it's not "selected", it's just shown with a faint wavy underline which is also hard to pick out when you have 50 items down the left of your screen. If this "Find in browser" caused the tree on the left to spin down and paint a big red highlight bar over the sketch selected in the history on the bottom, that would be a awesome and the way I would expect the tool to work. It's almost useless as it is.
Even if you guys added a simple "book mark" feature to the timeline that would be awesome. I'd be doing back flips over that. Not something heavy that causes stuff to rebuild and chug, just a simple way in the UI at the bottom to set nice tall flags that we can set to any color we want and leave a little note on each one, then give us a pop-up where we can quickly select one of the flags and instantly roll the history marker back to that spot.