The text inside the nodes is not streched to the right side of the node by using \hfill.Could it be the reason that it doesn't work with font=\tiny? But I need the text that small and I would like that the explanation text is at the right side inside the node and the short term like Frg 1 is on the left side inside the node.
\documentclass{article}\usepackage{tikz}\usetikzlibrary{positioning,shadows,arrows,backgrounds,fit,matrix}\begin{document}\begin{figure} [H]\begin{tikzpicture}[font=\tiny, pfeil/.style ={draw,->,shorten <=0pt,>=stealth', thick, -latex',shorten >=0pt}, stext/.style ={draw,solid, fill=gray!10, text width=25em,minimum height=1em, drop shadow, rounded corners}, snr/.style ={drop shadow,fill=gray!10,draw,solid,circle,minimum width=4mm,inner sep=0pt}, every matrix/.style ={matrix of nodes, row sep=1mm, column sep=3mm,fill=gray!40,draw=black,dashed,rounded corners,inner sep=2mm}] \newcommand{\beschr}[1]{\hfill\textit{#1}}; \matrix (einlegen) { \node (e11) {}; & \node (e12) [snr] {1.}; & \node (e13) [stext] {Frg 1\beschr{Freigabe Einfahrt Bauteil}}; \\ \node (e21) {}; & \node (e22) [snr] {2.}; & \node (e23) [stext] {MZ 11 V\beschr{Sauger ein}}; \\ \node (e31) {}; & \node (e32) [snr] {3.}; & \node (e33) [stext] {Frg 2\beschr{Freigabe Ausfahrt Bauteil}}; \\ }; \node [fit=(e11)(e31),label={[rotate=90,xshift=1mm]center:\textbf\tiny{Einlegen}}] {}; \matrix (arbeitsstellung) [below=.3cm of einlegen] { \node (a11) {}; & \node (a12) [snr] {4.}; & \node (a13) [stext] {MZ 12 V\beschr{Spanner Innenblech vorw\"arts}}; \\ \node (a21) {}; & \node (a22) [snr] {5.}; & \node (a23) [stext] {M1 \& M2 V\beschr{B\"ugel M1 \& M2 vorw\"arts}}; \\ \node (a31) {}; & \node (a32) [snr] {6.}; & \node (a33) [stext] {M3 \& M6 V\beschr{B\"ugel M3 \& M6 vorw\"arts}}; \\ \node (a41) {}; & \node (a42) [snr] {7.}; & \node (a43) [stext] {M4 \& M5 V\beschr{B\"ugel M4 \& M5 vorw\"arts}}; \\ \node (a51) {}; & \node (a52) [snr] {8.}; & \node (a53) [stext] {MZ 13 V\beschr{Klemmeinheit l\"osen}}; \\ \node (a61) {}; & \node (a62) [snr] {9.}; & \node (a63) [stext] {MZ 14 V\beschr{Niederhalteraufnahme vorw\"arts}}; \\ \node (a71) {}; & \node (a72) [snr] {10.};& \node (a73) [stext] {MZ 15-19 V\beschr{Niederhalteraufnahmen vorw\"arts}}; \\ \node (a81) {}; & \node (a82) [snr] {11.};& \node (a83) [stext] {MZ 21-22 V\beschr{Niederhalterzustellungen vorw\"arts}}; \\ \node (a91) {}; & \node (a92) [snr] {12.};& \node (a93) [stext] {MZ 23-24 V\beschr{Niederhalterzustellungen vorw\"arts}}; \\ \node (a101) {}; & \node (a102) [snr] {13.};& \node (a103) [stext] {MZ 20 V\beschr{Sperrventil vorw\"arts}}; \\ };\node [fit=(a11)(a101),label={[rotate=90]center:\textbf\tiny{Falze in Arbeitsstellung}}] {};\begin{scope} [every path/.style=pfeil] \path (e33) -- (a13); \end{scope} \end{tikzpicture}\end{figure}
