COOL!!! I learnt something new. I have always had the arrow key navigation checked. But I thought that was simply to highlight features, sketches, parts, etc. with the arrow keys. I had no idea it would control the rollback bar. Never tried it...
There is only drawback to this. My original problem with the rollback bar is that it is difficult to grab very quickly. That is why I opted to use the RMB, roll forward option when trouble-shooting the feature tree. Usually when I am trouble-shooting, I edit most sketches and features as I am rolling thru, just to verify them. When I do that, the arrow key navigation method still requires me to at least highlight the rollback bar each time, which brings me back to the original problem.
It will work for me in some cases. And I WILL be using this trick from time to time, I'm sure. But, I just wish my stinking RMB command to stay put!!!!