take the compass, place it on your solid. Notice that now the xyz have switched to uvw i.e local reference system based on your solid.
take the compass, and release it anywhere in 3D (anywhere BUT the low-right-corner...). the compass should fly back to its original position HOWEVER notice that it has retained uvw orientations...
you can now click on these letters (u,v,w) to rotate your CAD space.
To reset the compass back to global (x,y,z) coordinates, (there are several ways to achieve this) drop it onto the global axis located in the low-right-hand-corner.
regards,
LWolf