How to set Thickness of Node Outline

[PaltryProgrammer]

greetings & kind regards

may i please request is it possible to set the thickness of the line outlining a node . i have been unable to locate any such attribute under node - attributes .

thank you kindly

[steveroush]

Use penwidth (penwidth | Graphviz)
For example:

digraph width {
  a [penwidth=5]
  b [penwidth=10]
  c [pwnwidth=2]
  a -> b ->c
}

Gives:

[scnorth]

Ooops, the clipping there. Oh well.

[steveroush]

Increased pad value to fix the clipping & added some color:

digraph width {
  graph [pad=.2]  // note that pad is in inches
  a [penwidth=5]
  b [penwidth=10 color=lightblue]
  c [pwnwidth=2  color=purple]
  a -> b ->c
}

New & improved: