tikz arrow head not shown

Question

enter image description here in this simple example the arrow head is not drawn. I don't know why. My pgf version is 2.10.

\begin{tikzpicture}
    \draw[line width=0.1pt,gray!30]
    (0,0) grid (4,3);
    \draw[fill=black] (1,2) circle (2pt) coordinate(a)
                      node[above left]{$1$}
                      -- ++(0,-1) circle (2pt) coordinate(b) 
                      node[below left]{$2$}
                      -- ++(1,0) circle (2pt)
                      node[below left]{$3$}
                      -- ++(1,0) circle (2pt)
                      node[below left]{$4$};
   \draw[dashed,->] (b) -- ++(1,1);
  \end{tikzpicture}

I see the arrow with your code (using PGF 3.0). Can you provide a screenshot of what you get? — Gonzalo Medina, Jul 14 '15 at 17:03
Yes, in my PDF viewer(Evince) the arrow head only becomes visible when magnifiying to 175% — ywx, Jul 14 '15 at 17:36
I'm voting to close this question as off-topic because it was just than an element was too little and the OP needed viewer magnification to see it. — Gonzalo Medina, Jul 14 '15 at 17:39

AboAmmar · Accepted Answer · 2015-07-14T19:57:58.753

Consider also using a bigger arrow tip as >=latex:

\documentclass[12pt]{standalone}
\usepackage{tikz}
\usetikzlibrary{arrows}
\begin{document}

\begin{tikzpicture}[scale=1.5, >=latex]
    \draw[line width=0.1pt,gray!30]
    (0,0) grid (4,3);
    \draw[fill=black] (1,2) circle (.7pt) coordinate(a)
                      node[above left]{$1$}
                      -- ++(0,-1) circle (.7pt) coordinate(b) 
                      node[below left]{$2$}
                      -- ++(1,0) circle (.7pt)
                      node[below left]{$3$}
                      -- ++(1,0) circle (.7pt)
                      node[below left]{$4$};
   \draw[dashed,->] (b) -- ++(1,1);
  \end{tikzpicture}

\end{document}

enter image description here

There is also the advanced arrows.meta library if one is interested in more adjustments. The library has virtually endless parameters to play with. For example, you can adjust length, width, inset, slope ..etc

See section 16.3.1 of the documentation for more details.

I'm also looking at this: http://tex.stackexchange.com/questions/5461/is-it-possible-to-change-the-size-of-an-arrowhead-in-tikz-pgf — ywx, Jul 14 '15 at 18:10
arrows.meta is not the advanced library by the way. arrows is deprecated (but still supported for those who want to use it) and the standard library is now arrows.meta. — Alenanno, Jul 14 '15 at 20:41

tikz arrow head not shown

1 Answers1