In the 3D image below the following controls are available.
Action | Mouse | Touch |
Rotate: | Hold down button one and move. | One finger touch and move. |
Zoom in/out: | Shift and hold down button one and move vertically. | Double finger touch and change distance. |
Zoom (alt): | Roll mouse wheel. | |
Undo All: | Press 5 (compare with F5). | Simultaneous triple touch. |
Toggle Support for concave faces: | Press 'c' (convex / concave). |