is there a way to expand collapse only the first level documents or folders in the Binder (Research)?

⌘ 0 and 9 fully expand and collapse. I would like to see only the first level docs or folders, not the subdocs/folders.
thanks in advance for your time and help


From the manual:

Surprised you didn’t spot this! This statement in the manual comes directly after the place in the manual where the two commands you mentioned are detailed.

All Best,

thank you very much ! I will review the manual.