A number of hotkeys are available to carry out common viewer tasks. Before using a viewer hotkey, place the mouse focus on the viewer window.
| 
                             Key  | 
                             Action  | 
|---|---|
| 
                             Space  | 
                             Toggle between picking and viewing mode.  | 
| 
                             Up or Down or Left or Right  | 
                             Rotate about horizontal and vertical axes.  | 
Ctrl+Up orCtrl+Down  | 
                             Rotate about an axis normal to the screen.  | 
Shift+Up orShift+Down orShift+Left orShift+Right  | 
                             Moves the light source.  | 
| 
                             Ctrl+Shift  | 
                             When in viewing mode, you can hold Ctrl+Shift to select objects in the viewer. Releasing Ctrl+Shift returns you to viewing mode.  | 
| 
                             1  | 
                             Switches to one viewport.  | 
| 
                             2  | 
                             Switches to two viewports.  | 
| 
                             3  | 
                             Switches to three viewports.  | 
| 
                             4  | 
                             Switches to four viewports.  | 
| 
                             c  | 
                             Centers the graphic object in the viewer window.  | 
| 
                             n  | 
                             Toggles the projection between orthographic and perspective.  | 
| 
                             r  | 
                             Resets the view to the initial orientation.  | 
| 
                             u  | 
                             Undoes transformation.  | 
| 
                             U  | 
                             Redoes transformation.  | 
| 
                             x  | 
                             Sets view from +X axis.  | 
| 
                             X  | 
                             Sets view from -X axis.  | 
| 
                             y  | 
                             Sets view from +Y axis.  | 
| 
                             Y  | 
                             Sets view from -Y axis.  | 
| 
                             z  | 
                             Sets view from +Z axis.  | 
| 
                             Z  | 
                             Sets view from -Z axis.  |