Scroll the canvas
Drag 2 fingers on the canvas to move around the characters.
Rotate the canvas
Twist 2 fingers to tilt the view.
Zoom the canvas
Pinch 2 fingers to zoom in or out.
Isolate a single glyph
Tap 1 finger twice on any glyph cell in the canvas to isolate a specific character. And double-tap again to exit isolation view.
Undo
Tap 2 fingers to undo any operation.
Redo
Tap 3 fingers to redo any operation.