Is there any shortcut/command (or whatever else) to make TC to expand/collapse the whole directory branch (rec. subdirs) of a certain directory? Thanks for any tip and I hope I did not overlook a hidden feature existing already.

BTW, I am aware of the the old Total Commander tree that can be configured in configuration (enabling 'Always load complete directory tree'). However, in this case, the tree shows ALL directories and subdirectories of the current drive, but this is not what I want!