Fold ⌥ ⌘ ← option + command + left arrow
Unfold ⌥ ⌘ → option + command + right arrow
Unfold All ⌥ U option + U
Fold Methods & Functions ⌥ ⌘ ↑ option + command + up arrow
Unfold Methods & Functions ⌥ ⌘ ↓ option + command + down arrow
Fold Comment Blocks ⌃ ⇧ ⌘ ↑ control + shift + command + up
Unfold Comment Blocks ⌃ ⇧ ⌘ ↓ control + shift + command + down
Focus Follows Selection ⌃ ⌥ ⌘ F control + option + command + F
Fold All ⌘ ⌥ ⇧ ← command + option + shift + left
Unfold All ⌘ ⌥ ⇧ → command + option + shift + left