# pgfplot pin length

Consider the following example from the pgfplot manual.

\begin{tikzpicture}
\tikzset{
every pin/.style={fill=yellow!50!white,rectangle,rounded corners=3pt,font=\tiny},
small dot/.style={fill=black,circle,scale=0.3}
}
\begin{axis}[
clip=false,
title=How \texttt{axis description cs} works
]

\node[small dot,pin=120:{$(0,0)$}]
\node[small dot,pin=-30:{$(1,1)$}]
\node[small dot,pin=-90:{$(1.03,0.5)$}]
\node[small dot,pin=125:{$(0.5,0.5)$}]
\end{axis}
\end{tikzpicture}


That code gives the following image

What I want to change and I couldn't found in the manual is to change the length of the pins. For example make the text of the pin in the middle appear closer to the value 5 of the y axis and make the connecting line extent to that point. The result I want appears in the following picture.

Is that possible somehow?

-

You can use pin distance:

\documentclass{article}
\usepackage{pgfplots}

\begin{document}

\begin{tikzpicture}
\tikzset{
every pin/.style={fill=yellow!50!white,rectangle,rounded corners=3pt,font=\tiny},
small dot/.style={fill=black,circle,scale=0.3}
}
\begin{axis}[
clip=false,
title=How \texttt{axis description cs} works
]
\node[small dot,pin=120:{$(0,0)$}] at (axis description cs:0,0) {};
\node[small dot,pin=-30:{$(1,1)$}] at (axis description cs:1,1) {};
\node[small dot,pin={[pin distance=2cm]125:{$(0.5,0.5)$}}] at (axis description cs:0.5,0.5) {};