[Tex/LaTex] Maximise vertical space between subfigures with \subcaption

floatsspacingsubcaption

I have 2 subfigures vertically arranged using the subcaption package. I can set the vertical space between the 2 to something specific (using \bigskip or \vspace), but I would like to put as much space as possible between the 2 instead, so that the first subfigure is at the top of the page, and the second one at the bottom (with the caption for the whole figure beneath it) – something like \vfill.

Minimal working example:

\documentclass[10pt,a4paper]{article}
\usepackage{graphicx}
\usepackage{subcaption}

\begin{document}
\begin{figure}
    \begin{subfigure}{\textwidth}
        \centering \rule{4cm}{4cm} % 1st subfigure: \includegraphics{fig}...
    \end{subfigure}
    \par\bigskip % maximise vertical space here instead
    \begin{subfigure}{\textwidth}
        \centering \rule{4cm}{4cm} % 2nd subfigure: \includegraphics{fig}...
    \end{subfigure}
\caption{Some caption}
\end{figure}
\end{document}

Best Answer

I put a \vspace*{...} inside the subfigure block, just before \end{subfigure}. It applied the specified amount of spacing between my three subfigures. I did not try it using \fill, but I expect it would have a similar result. I've included a vague snippet of my code below. Hooray for simplicity!

\begin{figure*}[htb]
    \begin{subfigure}[t]{\linewidth}
        \label{}
        \centering\includegraphics[]{image1.eps}
        \caption{}
        \vspace*{2mm}
    \end{subfigure}
    \begin{subfigure}[c]{\linewidth}
        \label{}
        \centering\includegraphics[]{image2.eps}
        \caption{}
        \vspace*{2mm}
    \end{subfigure}
    \begin{subfigure}[b]{\linewidth}
        \label{}
        \centering\includegraphics[]{image3.eps}
        \caption{}
    \end{subfigure}
\end{figure*}
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