Given the Tikz example here http://www.texample.net/tikz/examples/double-arrows/

how do I increase the size of the arrow head? I'd like to make it way bigger but, after manipulating the code, I was only able to increase the angle of the arrow (up to 90 degrees).

1 Answer 1


One option would be to scale it (and change the shorten value accordingly):

\usetikzlibrary{arrows, decorations.markings}

  decoration={markings,mark=at position
   1 with {\arrow[scale=2,thin]{open triangle 60}}},
  double distance=1.4pt, shorten >= 10.5pt,
  preaction = {decorate},
  postaction = {draw,line width=1.4pt, white,shorten >= 4.5pt}
  line width=1.4pt, 
  shorten >= 4.5pt


  \node[draw,rectangle] (a) {A};
  \node[inner sep=0,minimum size=0,right of=a] (k) {}; % invisible node
  \node[draw,rectangle,right of=k] (b) {B};
  \node[draw,rectangle,below of=a] (c) {C};

  % 1st pass: draw arrows
  \draw[vecArrow] (a) to (b);
  \draw[vecArrow] (k) |- (c);

  % 2nd pass: copy all from 1st pass, and replace vecArrow with innerWhite
  \draw[innerWhite] (a) to (b);
  \draw[innerWhite] (k) |- (c);

  % Note: If you have no branches, the 2nd pass is not needed


enter image description here

I changed the old \tikzstyle to the more appropriate \tikzset syntax.

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .