There are some mouse controls that are not configurable (rotate view / pan view / select part / etc). Ideally these would be fully configurable but there are some technical limitations that make this not practical. One thing we could consider doing is providing a few different hard-coded control schemes for the mouse. These could show up in the controls dialog with a spinner to select the control scheme. The dialog would then list all the controls and how they are configured for that scheme. This would also make it easy for new players to quickly discover the various controls related to the mouse, particularly those that may not be obvious.
An example of how this could look:
