Hello deleo,
To rotate multiple objects, use the 3D Orbit toolbar or type 3DORBIT at the Command prompt. Pick and hold the left button and move the pointer in the direction you want the model to rotate. Release the button when the pointer is moving at the appropriate speed. The model will continue to rotate until you pick the left mouse button, press [enter] or [esc], or right-click and pick Exit or another option. At any time while the model is orbiting, you can left-click and adjust the rotation angle and speed by repeating the process for starting a continuous orbit. Hope this helps - John