The reason has to do with an oversize image. As LaTeX cannot fit it on a page it will float to the end. These type of figures are best to insert them manually
. You will need to define a different environment for this. Try modifying the \twopagepicture
by copying it a renaming it and just comment out the begin{figure}
and \end{figure}
.
\newcommand*{\twopagepicture}[4]{% copy twopagepicture an comment out
.....
% \begin{figure}[#1]
....
% \end{figure}%
% \begin{figure}[#1]
.....
% \end{figure}%
......
}
This ensures that the images will be shown exactly where placed.
To have a correctly placed two page spread firstly, one needs a method to clear to an even page, normally I would code it as follows:
\usepackage[strict]{changepage}
\makeatletter
\newcommand{\cleartoevenpage}{%
\clearpage%
\ifoddpage\c@page\hbox{}\clearpage\fi}
The second issue to take into consideration, is that the image width is always larger than the \textwidth
dimension and hence any scaling must be done on the \textheight
. This is important, otherwise you will get a new page.

The even page image is simply placed normally but issuing a \cleartoevenpage
before the placement and a \newpage after
it, producing the image shown above.
\cleartoevenpage
\includegraphics[height=0.95\textheight]{petra}
\newpage
The odd page image, will have to be shifted to the left by \textwidth
.
\hspace*{-\textwidth}\includegraphics[height=0.95\textheight]{petra}\hspace{1em}

The caption can be placed using a parbox
or a minipage
. In this case I have used a parbox
. If your captions will have more than a paragraph of text, then use a minipage. Depending on the amount of text you have it may look better if you shift it slightly up or down. This can be done either using a vspace
command or use a rule (I prefer the latter as I can have a visual clue and only zero the width at the final copy).
\parbox[b]{0.25\textwidth}{\lipsum*[1-2]\par\rule{1pt}{50pt}}
You can see the rule in the last image below.

Full MWE
\documentclass{book}
\usepackage[left=0pt,right=0pt,top=0.5in,bottom=0.5in]{geometry}
\usepackage{graphicx,lipsum,caption,crop}
\usepackage[strict]{changepage}
\makeatletter
\newcommand{\cleartoevenpage}{%
\clearpage%
\ifoddpage\c@page\hbox{}\clearpage\fi}
\begin{document}
First page
\cleartoevenpage
\includegraphics[height=0.95\textheight]{petra}
\newpage
\hspace*{-\textwidth}\includegraphics[height=0.95\textheight]{petra}\hspace{1em}
\parbox[b]{0.25\textwidth}{\lipsum*[1-2]\par\rule{1pt}{50pt}}
\end{document}
Hope this helps.
You can put the image and its description into a minipage
environment. Now you can set the width of image and Text below to the same value by just adjusting the minipage
width. Remark: you have to set the width of the image now to \linewidth
as \linewidth
is now the width of the minipage.
\documentclass{article}
\begin{document}
\begin{figure}[hp]\caption[]{Balancing Diagnostics Kernel}
\centering
\begin{minipage}{.7\linewidth}
%\includegraphics[width=\linewidth]{Gaus.pdf}
\rule{\linewidth}{10em}
\footnotesize
\emph{Notes:} This figure provides a graphical illustration of the common trend assumption. And again this figure provides a graphical illustration of the perfect approach for estimating something.
\end{minipage}
\end{figure}
Some other random text that should fill the whole line like blablabla and the like...
\end{document}

Best Answer
Found the problem.
Just needed to use: