Multi-level lists not documented
I can't find how to make multi-level lists. Only a single level is
documented in Text formatting: Help.
Somewhere on our own pages I found that a little 'o' gives a second
level indent, but how to do a third level?
Can this be documented in "Text formatting: Help" or in the "More
information" on that help page (btw, that page shows that 3 levels are
possible)?