Tipster Adrian Betana shares a LISP routine and other tricks that will help you switch between AutoCAD's Paper and Model Space tabs.
"Tired of switching tilemode from model space to layouts? When you enter the command TI, it prompts from 0 to 1, and if sometimes you're in model space, you can press Ctrl+Page Down and Ctrl+Page Up because you are wizard of layouts."
Notes from Cadalyst tip reviewer Brian Benton: The LISP routine provided is a quick and easy way to toggle between the different tabs. Load the routine and type TT on the Command line. It will switch you from model to paper or from paper to model space tabs. Typing TI on the Command line will bring up the TILEMODE variable settings, allowing you to make the change there. Type 0 for paper space and 1 for model space.
As stated, you can press Ctrl+Page Up or Ctrl+Page Down to toggle between the current file’s tabs. (Page Up or Down will toggle in a different direction, to the left or to the right.)