The purpose of panning the sheet with three mouse buttons?
Left mouse click and drag - pans the sheet.
The middle mouse click and drag - pans the sheet.
The right mouse click drag - pans the sheet and when released opens a context menu???!
I think something like that would make more sense and would be a better use of UI:
- Left mouse click and drag -> basic select.
- Second mouse click and drag -> panning
- The third mouse button click and drag could do something else without opening a context menu (which IHMO makes zero sense in that context).
What was the reasoning to have the same action with all the mouse buttons by default?
Actually all mouse buttons (it's a multiple button mouse) which in other application do completely other actions like back and forward also pan the sheet.
So I think it would make sense to assign different actions by default to each buttons.