gnome-design-team/gnome-mockups — comment on commit 60cae6e0ca6ff25d3ac8d0179ec1b3e41c313b49
File:  line 0
By mrdoob:

However, it may be confusing for a user figuring out the relation of the stylus button 1, button 2, ... and the mouse button 1, button 2, ...

![properties-mouse.gif](http://www.3dvelocity.com/reviews/wacom-bluetooth/pics/properties-mouse.gif)