I create a large rectangular viewport in paperspace. Shows, say, all of
what's in modelspace. I then create a smaller circular viewport for a
detail view. Place it within (or on top of) the large rectangular port.
Because it's a small viewport, I zoom in on it, still in paperspace. I
then double click within the circular viewport and zoom in, now in model
space, to the get the detail view I want. So far, so good. Here's the
problem. My view on screen is completely within the larger viewport.
Double clicking out of the little circular port puts me into model space
in the larger one. Zooming all or extents zooms within that viewport,
not out in paperspace. Setting tilemode to 0 doesn't help. How do I get
back to a full layout view showing all of both viewports?