[Ward]

Thanks, Derek, for the speedy work-around.

I forced a horizontal scroll bar by dragging the width of the rightmost column just a tad to the right. Now when I make the window narrower, the outline column stays put, and columns disappear off the right side of the window.

That's a huge improvement over what I had before. But when I move the horizontal scroll bar so I can see the rightmost columns, the outline (first) column disappears. Since this column is the name/label of the values that appear in columns 2-n, I'm left with values floating in space.

What I'd really like is for the horizontal scroll bar to appear only under columns 2-n, leaving the outline column always visible. I've seen this behavior is some applications with split-screen scroll bars.

While I wait for split-screen OmniOutliner, I can drag value columns of current interest to be near the outline column.

P.S. Although OmniOutliner's outline scrunching may be "standard behavior," it seems non-obvious and could/should be classified as a usability bug.