Label color — rectangle (full width) Label color circle — circle node Label color pill — auto-fit rounded box Label "note" color — with sublabel empty [circle|pill] — invisible spacer
Colors: pink green blue orange white gray purple yellow red teal cyan
Structure
serial / end — vertical stack parallel / end — side by side (split/merge) group "Name" repeat=N color=C / end residual / end — skip connection + addition residual multiply / end — skip connection × gating