digraph chapter02 { /* return 1+2*3+-5; */ rankdir=BT; ordering="in"; concentrate="true"; subgraph cluster_Nodes { Start1 [ shape=box style=filled fillcolor=yellow label="Start" ]; Con_13 [ label="#2" ]; Return14 [ shape=box style=filled fillcolor=yellow label="Return" ]; } edge [ fontname=Helvetica, fontsize=8 ]; Con_13 -> Start1[taillabel=0 style=dotted]; Return14 -> Start1[taillabel=0 color=red]; Return14 -> Con_13[taillabel=1]; }