should take you to model space (inside the viewport) and out to paper space
(Layout), respectively. If this doesn't work, then perhaps the viewport is
Locked, in which case you can use the MVIEW command to unlock it.
___
> I create a viewport in paper space, and it lets me pan and
> zoom the model space within the new viewport.
> When I'm finished, I switch back
> to the main layout, and I can no loger get back to the
> viewport to pan and zoom in model space.
>
> What am I missing ?