When you specify a new geometry, old values are not retained, so geometry
uses its standard method, which is of dividing the blank vertical space in a 2:3 ratio between top and bottom after applying the default text height.
Specify the missing parameters.
\documentclass{article}
\usepackage[left=2.5cm,right=2.5cm,top=2.5cm,bottom=2cm]{geometry}
\usepackage[demo]{graphicx}
\usepackage[english]{babel}
\usepackage{tikz}
\usepackage[utf8]{inputenc}
\usepackage{blindtext}
\usepackage{titlesec}
\begin{document}
\begin{figure}
\centering
\renewcommand{\arraystretch}{3}
\begin{tabular*}{\textwidth}{@{}ccc@{}}
\includegraphics[width=0.31\linewidth,height=2cm]{dummy} &
\includegraphics[width=0.31\linewidth,height=2cm]{dummy}&
\includegraphics[width=0.31\linewidth,height=2cm]{dummy}\\
\includegraphics[width=0.31\linewidth,height=2cm]{dummy} &
\includegraphics[width=0.31\linewidth,height=2cm]{dummy}&
\includegraphics[width=0.31\linewidth,height=2cm]{dummy}
\end{tabular*}
\end{figure}
\blindtext
\clearpage
\newgeometry{left=10mm,right=10mm,top=2.5cm,bottom=2cm}
\begin{figure}
\centering
\renewcommand{\arraystretch}{3}
\begin{tabular*}{\textwidth}{@{}ccc@{}}
\includegraphics[width=0.31\linewidth,height=2cm]{dummy} &
\includegraphics[width=0.31\linewidth,height=2cm]{dummy}&
\includegraphics[width=0.31\linewidth,height=2cm]{dummy}\\
\includegraphics[width=0.31\linewidth,height=2cm]{dummy} &
\includegraphics[width=0.31\linewidth,height=2cm]{dummy}&
\includegraphics[width=0.31\linewidth,height=2cm]{dummy}
\end{tabular*}
\end{figure}
\blindtext
\end{document}
However, this is the wrong method for accommodating a wide object in a figure. Use changepage
and its adjustwidth
environment, which doesn't require forcing a page break.
\documentclass{article}
\usepackage[left=2.5cm,right=2.5cm,top=2.5cm,bottom=2cm]{geometry}
\usepackage[demo]{graphicx}
\usepackage[english]{babel}
\usepackage{tikz}
\usepackage[utf8]{inputenc}
\usepackage{blindtext}
\usepackage{titlesec}
\usepackage{changepage}
\begin{document}
\begin{figure}
\centering
\renewcommand{\arraystretch}{3}
\begin{tabular*}{\textwidth}{@{}ccc@{}}
\includegraphics[width=0.31\linewidth,height=2cm]{dummy} &
\includegraphics[width=0.31\linewidth,height=2cm]{dummy}&
\includegraphics[width=0.31\linewidth,height=2cm]{dummy}\\
\includegraphics[width=0.31\linewidth,height=2cm]{dummy} &
\includegraphics[width=0.31\linewidth,height=2cm]{dummy}&
\includegraphics[width=0.31\linewidth,height=2cm]{dummy}
\end{tabular*}
\end{figure}
\blindtext
\begin{figure}
\centering
\begin{adjustwidth}{-1.5cm}{-1.5cm}
\renewcommand{\arraystretch}{3}
\begin{tabular*}{\textwidth}{@{}ccc@{}}
\includegraphics[width=0.31\linewidth,height=2cm]{dummy} &
\includegraphics[width=0.31\linewidth,height=2cm]{dummy}&
\includegraphics[width=0.31\linewidth,height=2cm]{dummy}\\
\includegraphics[width=0.31\linewidth,height=2cm]{dummy} &
\includegraphics[width=0.31\linewidth,height=2cm]{dummy}&
\includegraphics[width=0.31\linewidth,height=2cm]{dummy}
\end{tabular*}
\end{adjustwidth}
\end{figure}
\blindtext
\end{document}
includefoot
in the options togeometry
– egreg Nov 28 '14 at 21:10includefoot
but it has no effect. – Lenar Hoyt Nov 28 '14 at 21:40\newgeometry
for? If just for accommodating a wider table it's the wrong way. In any case you have to specify also top and bottom. – egreg Nov 28 '14 at 21:41