Tikz Matrix tiene grandes espacios entre filas

Question

Tengo un problema en el que la matriz que estoy insertando tiene espacios extremadamente grandes entre filas. Por alguna razón, el espacio entre cada fila es de alrededor de 10,5 cm y no puedo entender por qué. El siguiente código crea esta imagen, con la parte superior del cuadro de matriz saliendo de la página. Como puede verse, los nodos de tareas Leyenda y Facilitador tienen una brecha sustancial entre ellos.

\documentclass[a4paper,12pt]{article}

%Packages included
\usepackage[printwatermark]{xwatermark}
\usepackage{tikz}
\usepackage{xcolor}
\usepackage{sectsty}
\usepackage{graphicx}
\usepackage{hyperref}
\usepackage[margin=2cm]{geometry}
\usepackage{cite}
\usepackage{pdfpages}
\usepackage{tikz}
\usetikzlibrary{shapes, arrows, chains, positioning}
\usepackage{float}

\begin{document}
\begin{figure} [H]
\centering
    \begin{tikzpicture}[
        >=triangle 60,
        start chain=going below,
        node distance=0.6cm and 6cm,
        every join/.style={norm},
        ]

    \tikzset{
        base/.style={draw, on chain, on grid, align=center, minimum height=4ex, text=black},
        box/.style={base, rectangle, text width=10em},
        corner/.style={box, rounded corners},
        norm/.style={->, draw},
        test/.style={base, diamond, aspect=2, text width=5em},
        fac/.style={box, dotted},
        coord/.style={coordinate, on chain, on grid, node distance=0.6cm and 2cm}
        }

        \node [corner]  (start) {Start of process};
        \node [fac, join]       {Assemble expert panel};
        \node [box, join]   (stp)   {Panel review's indicators};
        \node [box, join]       {Panel provides anonymous feedback};
        \node [fac, join]       {Feedback reviewed by facilitator};
        \node [test, join]  (cons)  {Consensus reached?};
        \node [box]     (fin)   {Final indicator set compiled};
        \node [box, join]       {Indicators added to protocol, updated minimum data set added to protocol};
        \node [corner, join]        {Process finished};
        \node [fac, right =of cons] (upd)   {Indicators updated in line with feedback};
        \node [fac, left=of stp]    (ind)   {Indicators sourced from literature, best practice guidelines, etc.};

        \node [coord, right=of cons] (c1) {};

        \path (cons.south) to node [near start, xshift=0.5em] {$y$} (fin);
            \draw [*->] (cons.south) -- (fin);
        \path (cons.east) to node [near start, yshift=0.5em] {$n$} (c1);
            \draw [*->] (cons.east) -- (upd);
        \draw [->] (upd.north) |- (stp);

        \draw [->] (start.west) -| (ind);
        \draw [->] (ind.east) -- (stp);'

    \matrix [draw, above left] at (current bounding box.south east) {
        \node [box, text width=1em, color=white, label=right:\emph{Legend}] {};\\ 
        \node [fac, text width=1em, label=right:Facilitator Task] {}; \\    
    };



    \end{tikzpicture}
    \caption{Formal process for CQIs}
    \label{fig:delphi1}
\end{figure}

\end{document}

Actualmente soy nuevo en Latex y estoy aprendiendo de un montón de fuentes y tutoriales diferentes, por lo que es posible que mi código no tenga sentido.

Answer 1

¡Bienvenido! Los nodos de la matriz tienen las claves on chainy on gridde las que heredan base. Necesitas dejar estas llaves.

\documentclass[a4paper,12pt]{article}
\usepackage[margin=2cm]{geometry}
\usepackage{tikz}
\usetikzlibrary{shapes, arrows, chains, positioning}
%\usepackage{float}

\begin{document}
\begin{figure} [htb]
\centering
    \begin{tikzpicture}[start chain=going below,
        >=triangle 60,       
        node distance=0.6cm and 6cm,
        every join/.style={norm},
        ]

    \tikzset{
        mbase/.style={draw,   align=center, minimum height=4ex, text=black},
        base/.style={mbase,on chain,on grid},
        mbox/.style={mbase, rectangle, text width=10em},
        box/.style={base, rectangle, text width=10em},
        corner/.style={box, rounded corners},
        norm/.style={->, draw},
        test/.style={base, diamond, aspect=2, text width=5em},
        fac/.style={box, dotted},
        mfac/.style={mbox, dotted},
        coord/.style={coordinate, on chain, on grid, node distance=0.6cm and 2cm}
        }
        \node [corner]  (start) {Start of process};
        \node [fac, join]       {Assemble expert panel};
        \node [box, join]   (stp)   {Panel review's indicators};
        \node [box, join]       {Panel provides anonymous feedback};
        \node [fac, join]       {Feedback reviewed by facilitator};
        \node [test, join]  (cons)  {Consensus reached?};
        \node [box]     (fin)   {Final indicator set compiled};
        \node [box, join]       {Indicators added to protocol, updated minimum data set added to protocol};
        \node [corner, join]        {Process finished};
        \node [fac, right =of cons] (upd)   {Indicators updated in line with feedback};
        \node [fac, left=of stp]    (ind)   {Indicators sourced from literature, best practice guidelines, etc.};

        \node [coord, right=of cons] (c1) {};

        \path (cons.south) to node [near start, xshift=0.5em] {$y$} (fin);
            \draw [*->] (cons.south) -- (fin);
        \path (cons.east) to node [near start, yshift=0.5em] {$n$} (c1);
            \draw [*->] (cons.east) -- (upd);
        \draw [->] (upd.north) |- (stp);

        \draw [->] (start.west) -| (ind);
        \draw [->] (ind.east) -- (stp);'
    \matrix [draw, above left] at (current bounding box.south east) {
        \node [mbox, text width=1em, color=white, label=right:\emph{Legend}] {};\\ 
        \node [mfac, text width=1em, label=right:Facilitator Task] {}; \\    
    };



    \end{tikzpicture}
    \caption{Formal process for CQIs}
    \label{fig:delphi1}
\end{figure}

\end{document}