Left mouse button actions

The left mouse actions in the 3D window affect either the camera or light positions (depending which is selected in the drop-list on the camera/lights page)

bulletLeft Drag: drag the camera/light up or down (left - right movement is ignored)
bulletShift Left Drag: camera only - zoom the image (drag right to increase size, dragged left to decrease)
bulletControl Left Drag: rotate the camera/light position

 

Right mouse button actions

Right mouse actions in the 3D window are only effective if a background image is loaded which is bigger than the 3D window.

bulletRight Drag: drag the image in the 3D window
bulletShift Right Click: centre background image
bulletControl Right Click: toggle between 'stretched to fit' and full-size image

From v9.0, there is the additional facility:

bulletShift Right Drag: zoom image (drag right to increase size, dragged left to decrease). Shift right click returns are the image to full-size