Yes, that’s an option. It’s just that it seemed to me that they were going to make a column (outline) format work in a normal way and the manual stated that. Then they said, essentially, that currently it was only half working with selections and collections but not the main normal windows. But it didn’t work when I tried it.
I was rather hoping that it wasn’t their mistake, but some special meaning for “multiple selections” or “collections” that was different from what I was doing.