There are times when you’re almost done, on finishing your drawing, but the only hindrance in doing so are some of the details on your drawing that can’t seem to fit all inside in one paper. And the only solutions you might think is whether you separate it on another paper or just re arrange it.
I remember in my case when I encountered such predicament, I opted to just re-arranged it rather separate it in another paper. I re-arrange the drawing not in model space but in paper space, because I’m afraid it might ruin all the dimensions that I made.
With this, the UCSFOLLOW command and UCS Entity came in handy. These two AutoCAD commands will allow you to do exactly what you want, rotating your drawing without moving it in model space, you can just do it in paper space alone.
First things first you have to make sure your paper space is on UNLOCK mode.
Then while on the paper, space key-in the Mspace command to enter on the model space. Then key-in comand UCSfollow, set the new value to 1 (the default value is 0).
Thats all, my drawing been rotated without doing it actually in model space.