Sequentially arrange multi-page side by side figures

Question

I have many images to display on multiple pages, with 4 rows of 2 images side by side (total 8) per page.

However, I do not want the images at the last page (sometimes <4 rows) to be centered, but ordering from top to bottom. This is done by specifying \begin{figure}[ht].

Code for first 2 images (and repeats for another 5 times for the total 7 rows):

\documentclass[]{article}
\usepackage{floatrow}
\usepackage{graphicx}
\begin{figure}[ht] 
\begin{floatrow} 
\begin{minipage}[t]{0.4\linewidth} 
\includegraphics[width=120pt]{image1.pdf} 
\end{minipage} \hspace{-55pt} 
\begin{minipage}[t]{0.8\linewidth}\vspace{20pt} 
\includegraphics[width=370pt]{image2.pdf}
\newline 
\vspace{-50pt} 
\end{minipage} 
\end{floatrow} 
\end{figure}

\begin{figure}[ht] 
\begin{floatrow} 
\begin{minipage}[t]{0.4\linewidth} 
\includegraphics[width=120pt]{image3.pdf} 
\end{minipage} 
\hspace{-55pt} 
\begin{minipage}[t]{0.8\linewidth}\vspace{20pt} 
\includegraphics[width=370pt]{image4.pdf}
\newline 
\vspace{-50pt} 
\end{minipage} 
\end{floatrow} 
\end{figure}

But the resultant images are not arranged correctly, with only 3 images being on the 1st page and 4 on the second:

The desired output is to occupy pages fully (4 images first page), and then occupy from top to bottom in the subsequent page, if there is less than 4 images left:

Answer 1

• You not provide any information about your document.
• The sum of width of minipages in one row is bigger than text width. This cause problems to placements figure on page.
• instead of float rows and minipages I would rather use tabular at least for each row with figures:

\documentclass{article}
\usepackage[showframe]{geometry}
\usepackage[demo]{graphicx}
\setcounter{totalnumber}{4}         % 2 may work better
\renewcommand{\textfraction}{0.05}  % allow minimal text w. figs


\begin{document}
    \begin{figure}[h]
    \setkeys{Gin}{width=\linewidth}
\begin{tabular}{@{} p{\dimexpr0.25\linewidth-\tabcolsep} 
                    p{\dimexpr0.75\linewidth-\tabcolsep} @{}}
\includegraphics{image1.pdf}
    &   \includegraphics{image2.pdf} 
\end{tabular}
\end{figure}

\begin{figure}[h]
    \setkeys{Gin}{width=\linewidth}
\begin{tabular}{@{} p{\dimexpr0.25\linewidth-\tabcolsep}
                    p{\dimexpr0.75\linewidth-\tabcolsep} @{}}
\includegraphics{image3.pdf}
    &   \includegraphics{image4.pdf}
\end{tabular}
    \end{figure}

\begin{figure}[h]
    \setkeys{Gin}{width=\linewidth}
\begin{tabular}{@{} p{\dimexpr0.25\linewidth-\tabcolsep}
                    p{\dimexpr0.75\linewidth-\tabcolsep} @{}}
\includegraphics{image5.pdf}
    &   \includegraphics{image6.pdf}
\end{tabular}
    \end{figure}

\begin{figure}[h]
    \setkeys{Gin}{width=\linewidth}
\begin{tabular}{@{} p{\dimexpr0.25\linewidth-\tabcolsep}
                    p{\dimexpr0.75\linewidth-\tabcolsep} @{}}
\includegraphics{image7.pdf}
    &   \includegraphics{image8.pdf}
\end{tabular}
    \end{figure}

\clearpage
\begin{figure}[h]
    \setkeys{Gin}{width=\linewidth}
\begin{tabular}{@{} p{\dimexpr0.25\linewidth-\tabcolsep}
                    p{\dimexpr0.75\linewidth-\tabcolsep} @{}}
\includegraphics{image9.pdf}
    &   \includegraphics{image10.pdf}
\end{tabular}
    \end{figure}

\begin{figure}[h]
    \setkeys{Gin}{width=\linewidth}
\begin{tabular}{@{} p{\dimexpr0.25\linewidth-\tabcolsep}
                    p{\dimexpr0.75\linewidth-\tabcolsep} @{}}
\includegraphics{image7.pdf}
    &   \includegraphics{image11.pdf}
\end{tabular}
    \end{figure}

\begin{figure}[h]
    \setkeys{Gin}{width=\linewidth}
\begin{tabular}{@{} p{\dimexpr0.25\linewidth-\tabcolsep}
                    p{\dimexpr0.75\linewidth-\tabcolsep} @{}}
\includegraphics{image9.pdf}
    &   \includegraphics{image12.pdf}
\end{tabular}
    \end{figure}
\end{document}

• it is not clear why you like to have each figures pair as standalone float. You should consider to merge four or more rows with figures into one float:

\documentclass{article}
\usepackage[showframe]{geometry}
\usepackage[demo]{graphicx}

\begin{document}
    \begin{figure}[ht]
    \setkeys{Gin}{width=\linewidth}
\begin{tabular}{@{} p{\dimexpr0.25\linewidth-\tabcolsep} 
                    p{\dimexpr0.75\linewidth-\tabcolsep} @{}}
\includegraphics{image1.pdf}
    &   \includegraphics{image2.pdf}    \\
\includegraphics{image3.pdf}
    &   \includegraphics{image4.pdf}    \\
\includegraphics{image5.pdf}
    &   \includegraphics{image6.pdf}    \\
\includegraphics{image7.pdf}
    &   \includegraphics{image8.pdf}    
\end{tabular}
    \end{figure}

\begin{figure}[ht]
    \setkeys{Gin}{width=\linewidth}
\begin{tabular}{@{} p{\dimexpr0.25\linewidth-\tabcolsep}
                    p{\dimexpr0.75\linewidth-\tabcolsep} @{}}
\includegraphics{image9.pdf}
    &   \includegraphics{image10.pdf}   \\
\includegraphics{image7.pdf}
    &   \includegraphics{image11.pdf}   \\
\includegraphics{image9.pdf}
    &   \includegraphics{image12.pdf}   \\
\end{tabular}
    \end{figure}
\end{document}

If you like to ad captions to your figure, than you need to put in separate table row. For example like this:

    \begin{figure}[ht]
    \setkeys{Gin}{width=\linewidth}
\begin{tabular}{@{} p{\dimexpr0.25\linewidth-\tabcolsep} 
                    p{\dimexpr0.75\linewidth-\tabcolsep} @{}}
\includegraphics{image1.pdf}
    &   \includegraphics{image2.pdf}    \\
\caption{figure 1}
    &   \caption{figure 2}              \\
% rest of float's body