Esc | Hide Overflow. |
Tab | Cycle selection highlight through items. |
Shift-Tab | Cycle selection highlight through items in reverse. |
Arrow keys | Move selection highlight between items. |
⌘ + up / down arrow Page up / down | Move up or down through the categories list. |
⌘ + number | Select a category corresponding to the number pressed. |
Space, Return, ⌘O | Launch the currently highlighted item. |
Option + Click on item | Launch the clicked item but keep Overflow visible. |
Command + Click on item | Reveal the clicked item in the Finder. |