Drag from any port to another to run a cable, or tap one port then another. Drag across empty space (or Shift-drag from anywhere) to select gear and cables together; Shift-, Ctrl- or ⌘-click adds one. Ctrl/⌘+C and V copy and paste. Boxes snap into line as you move them (hold Option/Alt to stop that). Scroll or Space-drag to pan, Ctrl + scroll zooms. On iPad, use Select.