You can use the following keyboard shortcuts for selecting objects in the Viewer window.
| Action | Keyboard Shortcut | 
|---|---|
| Hide selection | H | 
| Hide all | H with no selection | 
| Show selection | S | 
| Show all | S | 
| Toggle selection | Spacebar-click or drag | 
| Select and show in Navigator | Double-click | 
| Add to/remove from selection | Ctrl-click, or Spacebar-drag | 
| Select all in group | G-click | 
| Add group to selection | G-right-click | 
| Select object and children | Spacebar-right-click | 
| Select root of hierarchy | Ctrl-right-click | 
| Select object and parents | Shift-right-click | 
| Select whole hierarchy | Ctrl-Shift-right-click | 
| Go up the hierarchy (parent) | Page Up | 
| Go down the hierarchy (first child) | Page Down |