Alt + Ctrl + [(Mac: ⌥⌘ [)
):
Folds the code when the current cursor is the starting point of a scope.
(a line with a shape on the left)
Alt + Ctrl +] (Mac: ⌥⌘])
):
Unfolds the collapsed area. This does not work at the end of the collapsed area.
Ctrl + K + 1 (Mac: ⌘K1)
): Folds all unfolded areas.
Ctrl + K + 0 (Mac: ⌘K0)
): Unfolds all collapsed areas.