Translate along x, y, or z vector

Rotate around x, y, or z vector

Translate (Pan) within xy, xz, yz plane

 

Within the Assembly environment:

Hold Ctrl + Alt and use MMB or RMB to orient the model

MMB – 3D tumble

RMB – pan parallel to screen

From a workflow point of view this is probably faster but less precise than using the 3D Dragger