Hi, I can’t seem to find out how to collapse all the folders. From reading old support posts it should be something in the binder but the UI has changed too much from the mac screenshots I found to be useful. Thanks.
Unless you changed the default shortcuts you can use these:
Expand all : Alt + PgDown
Collapse all: Alt + PgUp
selection only: Alt + *
to current level: Alt + -
Works in Binder and Outliner.
The menu commands and shortcuts can be found under Navigate > Outline; as Linus said, these work in both the binder and outliner views.