Hi Martin, sorry no there's no option to keep panels always collapsed - I think that would have a bad side effect of always requiring additional clicks all the time to access any tools at all.

Right now it's intentionally designed for the last used panel to stay open so that the UI that you are currently using remains open and more directly accessible right at the top level rather than every single button always all hidden away at a secondary level which is what would happen if I understand what you're asking about.

Are there any tools in particular that you are having problems losing track of? Overall the buttons that MoI uses are pretty large and all labeled with text on each one, which usually helps make things much easier to scan.

- Michael