I would like to add a figure, but I would like to control both width and length of figure. I know to control length and width separately but not together. Could anyone let me know the command to do that.
I am using the following commands:
\begin{figure}[H] \centering \includegraphics[height=8cm]{Images/abc} \caption{abc} \label{fig:abc} \end{figure} 
[height=…, width=…], but in general, it will change the aspect ratio of the figure.\documentclass{...}, the required\usepackage's,\begin{document}, and\end{document}. That may seem tedious to you, but think of the extra work it represents for TeX.SX users willing to give you a hand. Help them help you: remove that one hurdle between you and a solution to your problem.