# Place the cursor inside "graph" to get some refactoring options

graph {

    # To refactor nodes, place the cursor left to a node name
    a -- b
    a -- c;
    a -- d;

    # Hover over color names to get a color picker
    b -- b [color=blue]
    b -- d [color="#ff0000"];

    # Get completion when assigning a shape or color
    b [shape=box, color=yellow];

    a; # You can remove optional ; by placing the cursor left to a semicolon
}