Ctrl+Shift+[    Fold (collapse) region  editor.fold
Ctrl+Shift+]    Unfold (uncollapse) region  editor.unfold
Ctrl+K Ctrl+[   Fold (collapse) all subregions  editor.foldRecursively
Ctrl+K Ctrl+]   Unfold (uncollapse) all subregions  editor.unfoldRecursively
Ctrl+K Ctrl+0   Fold (collapse) all regions editor.foldAll
Ctrl+K Ctrl+J   Unfold (uncollapse) all regions