Lock angles when rotating object?

[NLTMW]

Is there a way to "lock" the object rotation? When dragging the object to rotate, maybe hold down a key to have it lock on every 15 degrees or so?

Thanks,

Mike
Never Let The Machines Win

[CompoundCarl]

Just double-click on the model and then you can enter exact numeric values for the rotation (or use the up/down arrows which rotate by a fixed amount)