May I suggest that you look at Apple's Human Interface Guide Lines for OS X and iOS versions of your FreeCAD Contributions?

Commenting post 512: May I suggest that you look at Apple's Human Interface Guide Lines for OS X and iOS versions of your FreeCAD Contributions?

These guidelines are more human-oriented than others that currently used in FreeCAD. It is very easy to get lost in the very Complex and Powerful application such as FreeCAD.