When you drag a folder (or its link from the Explorer's address bar).
It was a core feature, imo. Even something as archaic (yet extremely useful, even in 2025) as Total Commander for Android (!) has that feature.
I'll have to stay on v3.8.0 then (at least for now).
And on that note, why was "dragging the whole window using any empty space" feature (present in v2.6.2, for example) removed since v3.x?.. Extra handy, and feels like I'm using a modern app (instead of an old-fasioned one, which relies on the "title bar" - even if it's not visible per se), imo.