| Click a wire | Shows its nodes — drag one to reroute |
| Drag a hollow dot | Adds a node in the middle of a segment |
| Double-click a node | Removes it (⌥-click works too) |
| Colour | Pick a swatch in the right sidebar — with a wire selected it recolours it, otherwise it sets the colour for new wires |
| Crossings | Wires that cross without connecting hop over each other; switch it off per wire in the inspector |
| Custom block | Place it, then name the block and add or rename its IO on the right |
Everything is saved in this browser automatically. Use Save to keep a .circuit file.