Michael

I am in front view.
Hopefully this image is clearer than my roughly drawn one.

The edit frame when squashing the cross sections in front view aligns with World Coordinate System rather a local Coordinate system.

@Frenchy

Yes aligning the cplane is another way in MoI.


I think both of you are missing the point. There are otherways you can achieve the same thing in MoI and most software for that matter but having a widget or edit frame that you scale, rotate or move in the Local Coordinate system of the object is quicker and easier than all the otherways which is the reason most 3D software have such an option.