
Using \textwidth, \linewidth or \hsize has no difference. I don't mind if it indents, but the image should be center-aligned.
\documentclass{article}
\usepackage{graphicx}
\graphicspath{{C:/Users/Ooker/Desktop/Images/}}
\title{Quả cầu}
\begin{document}
\maketitle
text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text text
\includegraphics[width=1\textwidth]{Octahedron}
test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test
I use XeLaTeX.
centerenvironment. – daleif Dec 13 '17 at 10:20Xeg\begin{center} X \end{center}– David Carlisle Dec 13 '17 at 10:46