By Reference Point
To rotate a drawing or drawing element using a reference point:
1. Click Rotate in Modify.
2. Click 2 Points in Rotate.
3. Specify a rotation reference point on the drawing or element.
4. Specify the destination for the rotation reference point.
5. Enter the angle of rotation. Alternatively, you can define the angle by specifying two points. A positive angle results in a counterclockwise rotation.
6. Select the element(s) to be rotated.