The ROTATE command allows you to rotate an object(s) around a point
of reference on the XY plane.
To select the Rotate command you can:
select Rotate under the Modify Menu,
OR
type rotate at a Command: prompt and press Enter,
OR
Click on the Rotate button.
If an Osnap is used:
--The next prompt is: of: Place the element to snap
to in the square cursor icon.
--Prompt: Angle>/Reference: Type an angle of rotation
and press Enter. The object will rotate the degrees indicated. NOTE:
The angle can be a positive or negative number.