test.tex 

test-nodraft.tex 

 \documentclass[draft]{article}

\usepackage{graphicx}

\begin{document}

\pagestyle{empty}

Hi. all.

\includegraphics{testt.png}

\end{document}

 \documentclass{article}

\usepackage{graphicx}

\begin{document}

\pagestyle{empty}

Hi. all.

\includegraphics{testt.png}

\end{document}