PSP 9 Workspace window question

[ruach]

Maybe stress has caused me to have a major brain fart, or maybe it's because I've been working in too many different photo editing programs, but
suddenly yesterday I could not move a photo I was working on past the edges of the workspace window in PSP 9.

What I mean is, I have a clear recollection of while working on images, that when I blow them up really large, I can move them in the viewing window
workspace, to where I can see the edge of any one (or two) sides of the image and the grey workspace grid behind it. Now for some reason, I cannot do that.

I did kind of figure out how to float and image and move it, but I never had to do that before to have the edges of the image visible (not butted right
up against the edges of the workspace window.

If you could help me resolve this I'd be very grateful.

[LindaSue]

Did you accidentally turn on Tabbed Documents? Look under the Window menu and see if it's checked.