You can rotate selected objects around a base point to an absolute angle.
The following prompts are displayed.
Select objects
Use an object selection method and press Enter when you finish.
Specify base point
Specify a point.
Specify rotation angle
Enter an angle, specify a point, enter c, or enter r.
Rotation Angle. Determines how far an object rotates around the base point. The axis of rotation passes through the specified base point and is parallel to the Z axis of the current UCS.
Copy. Creates a copy of the selected objects for rotation.
Reference. Rotates objects from a specified angle to a new, absolute angle. When you rotate a viewport object, the borders of the viewport remain parallel to the edges of the drawing area.