Often times I go to rotate without putting the mouse on an object and my model disappears in space...  Is there a way to SET a FIXED point in a model that the model will consistently rotate about, or perhaps, at least, an option to disable 'rotate about selection'?  Even rotate about CoM or CoV would be preferable at times (as long as the setting isn't overridden when I do click on an object and go to rotate the model).

Thanks!

Jesse