You can use the following keyboard shortcuts to select objects in the Viewer window.
| Action | Keyboard Shortcut | 
|---|---|
| Select (exclusive) | Click or drag | 
| Append to selection | Middle-click or drag | 
| Remove from selection | Right-click or drag | 
| Toggle selection | Spacebar-click or drag | 
| Select range | Click, then Shift-select | 
| Hide selection | Shift-H | 
| Toggle EZ Selection On and Off | Alt+Shift+A | 
| Hide all | Shift-H with no selection | 
| Show selection | Shift-S | 
| Show all | Shift-S with no selection | 
| 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-middle-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) | Alt-Up arrow | 
| Go down the hierarchy (first child) | Alt-Down arrow | 
| Go sideways in the hierarchy (left sibling, same level) | Alt-Left-arrow | 
| Go sideways in the hierarchy (right sibling, same level) | Alt-Right-arrow | 
For additional Viewer window selection keyboard shortcuts, see Working with occluded textured geometric elements.