Graphviz

Beautify Edges

Edge Attributes

label	arrow	other
URL labelURL headURL tailURL edgeURL lp head_lp tail_lp xlp headclip tailclip href headhref tailhref edgehref labelhref label headlabel taillabel xlabel headport tailport headtarget tailtarget edgetarget labeltarget headtooltip tailtooltip edgetooltip labeltooltip label_scheme labelangle labeldistance labelfloat labelfontcolor labelfontname labelfontsize

arrowhead arrowsize arrowtail color colorscheme comment constraint decorate dir fillcolor fontcolor fontname fontsize id len lhead ltail minlen nojustify penwidth pos samehead sametail showboxes target tooltip weight

Edge label

All kinds of labels

label	xlabel	headlabel	taillabel

Difference between label and xlabel 1

Attribute label works not good as expected while using in subgraph.

label	xlabel	label in subgraph	xlabel in subgraph

Difference between label and xlabel 2 (constraint=false)

• The label is gone.
• Space of xlabel is not enough.

label
xlabel
xlabel with minlen=4
label in subgraph
xlabel in subgraph
xlabel in subgraph with minlen=4