Viewport Rotation Commands in Modelspace
USCAD's Ron Couillard demonstrates two practical methods to adjust a modelspace View with DVIEW TWIST and UCS OBJECT commands in Civil 3D.
From the USCADBuilding YouTube channel
and Ron Couilard's blog on USCAD.com
My only addition to Ron's great walk-throught is that you usually want to create a named modelspace View when you get the desired rotated result.
That saves you the effort of having to work throught the whole process again and the named View provides more consistent results.