The most common way of controlling the viewpoint in CopyCAD is by using the mouse. It is recommended that you use a three button mouse but options are provided for using a two button mouse.
The table below summarises the view control available with the mouse.
| View Manipulation | 3 Button Mouse | 2 Button Mouse |
| Trackball Rotation | Middle Button | Ctrl + Shift + Right Button |
| Rotate about X | Shift + Alt + Left Button | Shift + Alt + Left Button |
| Rotate about Y | Shift + Alt + Middle Button | Not available |
| Rotate about Z | Shift + Alt + Right Button | Shift + Alt + Right Button |
| Pan | Shift + Middle Button | Shift + Right Button |
| Zoom In / Out | Ctrl + Middle Button | Ctrl + Right Button |
| Zoom to Box | Alt + Middle Button | Alt + Right Button |
| Zoom Undo | F5 | F5 |
| Resize to Fit | F6 | F6 |
Using 'trackball twiddling' can seem quite strange initially but is usually quickly mastered. Trackball twiddling operates in the same manner as if you were 'twiddling' a ball
If you start with the cursor in the middle of the window and press the middle mouse button then drag the cursor up the screen the model will move as you move the mouse. To envisage how the model will move, imagine that you have your finger on the top of a ball centred in the graphics window. As you move your finger (and the ball with it) a new orientation of the ball becomes visible. If you have the cursor anywhere other than at the centre of the window then the model will move in the same way as if you had your finger at the equivalent position on a ball and then moved it.
