how to setup blender for Surface Pro 4 Using blender on Surface Pro 4. 
I've set the virtual pixel mode to "double" and it's great for the display UI. But I can't manipulate anything with the rotate tool using either the pen or a mouse.

I've tried playing with the manipulator size and handle size, but that doesn't help.

I also can't navigate/move the view using the pen. 

Anyone have any setup suggestions to get me going?
The Emulate 3 Button Mouse setting let me use the pen to interact with objects and the scene. 

The problem I was having with the rotate manipulator turned out to be a separate issue, and was fixed by changing the selection mode under User Preferences>System from automatic to OpenGL Occlusion Queries.