Hi!
Excerpt from the viewport controls:
LMB + Drag - Creates a marquee selection box.
RMB + Drag - Pans the viewport camera.
Is it possible that I can swap that for my Setup?
I am used to the viewport navigation from the UEd 2.0 and UE4 feels so weird 
I can’t really get used to use the right mouse button for panning the viewport; I always automatically use the left one 
(In perpective mode the left mouse button is still used for panning)
Maybe it is even possible to make this completely customisable (I want the old navigation back :D)?