There are several ways to control which levels are visible in lists with multiple levels. Depending on the list, you can use one or more of the following methods.
| One level | ||||
|---|---|---|---|---|
| Home tab on the ribbon; View menu in classic view. | Expand | Collapse | ||
| Ribbon/Toolbar | 
                                                             | 
                                                             | ||
| Mouse | Double-click an entry (except lowest level) | Double-click an entry (except lowest level) | ||
| Keys | [®] | [¬] | ||
| All levels | ||||
| Expand All | Collapse All | |||
| Mouse | [Expand All] | [Collapse All] | ||
 
 