Press and hold left or right mouse buttons to change geometry/view.
Use CTRL-key to switch between geometry and view settings.
- left mouse button: change ellipse radius (a, b), move view center
- right mouse button: change ellipse angle (β), zoom
- mouse wheel: zoom
- double click: reset view
Use multi- and single-touch gestures on the plate to change geometry/view.
- two fingers: change geometry of ellipse (a, b, β)
- pan: move ellipse/view
- press and hold: zoom in
- double-tap: reset view
