Set Viewport Angle

Twists the Viewport's Rotation Angle by specified amount. Rotates any Paper Space North Arrow Blocks Selected also

IMSetViewportAngle

Command: IMSetViewportAngle
Set viewport angle [Object/eXit] <eXit>: O	You can type in an angle. Optionally, you can choose to use an object.
Select destination rotation object:
Select north arrow block to rotate or <exit>:	Once an angle has been specified, whether through an object or by typing you can select a block that represents the north arrow in paper space. This will rotate the north arrow to match the angle.
	The cross hair cursor will also be rotated to match.