Desktop Controls
Double-click empty space: Create node
Single-click node: Select node
Drag node: Move it around
Drag empty space: Pan canvas
Right-click node: Start edge
Click node: Complete edge (toggle)
Middle-click node: Delete node
Backspace: Delete selected node
Mouse wheel: Zoom in/out
Mobile Gestures
Tap node: Select node / complete edge if edge mode
is active
Tap empty space: Deselect or cancel edge mode
Drag node: Move node
Drag empty space: Pan canvas
Double-tap node: Start edge mode
Tap second node: Complete edge (toggle)
Double-tap empty space: Create node
Select node + long-press same node: Delete node
Pinch: Zoom in/out