@skybert For quick folding of some level applied to the whole file I find "set-selective-display" (C-x $) which with numerical prefix hides lines with identation larger or equal to that value.
@skybert `hs-cycle` isn't part of `hs-minor-mode`, right?
@bosko no , it *is* a part of it, see: https://github.com/emacs-mirror/emacs/blob/master/lisp/progmodes/hideshow.el#L1427
@skybert Ah, ok. It was added in December last year and was not ported to emacs-30. That's why I didn't see it 😉