Now that we've solved the interface problem, what can we do with it?
| M-o t | Hide all body lines (show only headings) |
| M-o e | Expand one section |
| M-o c | Collapse one section |
| M-o o | Expand this one section, hide all others |
| M-o n | Move to next heading |
| M-o p | Move to previous heading |