+--------------------+--------------------------+----------------------------------------------------------------------------------------+
| Keyboard Shortcuts |        Categories        |                                        Commands                                        |
+--------------------+--------------------------+----------------------------------------------------------------------------------------+
| ⌘ D                | Document editting        | Duplicate                                                                              |
| ⌘ Z                | Document editting        | Undo                                                                                   |
| ⇧ ⌘ Z              | Document editting        | Redo                                                                                   |
| ⌘ S                | Document editting        | Save                                                                                   |
| ⌘ ⌫                | Document editting        | Delete selected Content                                                                |
| H (Pressed)        | Document editting        | Pressed: Hide all                                                                      |
|                    |                          | Released: Restore                                                                      |
| ⌥ H                | Document editting        | Toggle the Hidden property of the selected Content                                     |
| ←                  | Timeline                 | To previous frame (0.1 seconds), long press to accelerate                              |
| →                  | Timeline                 | To next frame (0.1 seconds), long press to accelerate                                  |
| ↑                  | Timeline                 | To previous keyframe                                                                   |
| ↓                  | Timeline                 | To next keyframe                                                                       |
| [                  | Timeline                 | To content begin                                                                       |
| ]                  | Timeline                 | To content end                                                                         |
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