I have the following chart in a png format that I need to include in latex file:
There is a way to add a legend over the figure using latex, like in the outline below?
Edit: Simple working code
\documentclass{article}
\usepackage{graphicx}
\begin{document}
\includegraphics[width=\textwidth]{tek00000.png}
\end{document}


\documentclasscommand, have a minimal preamble and then\begin{document}...\end{document}. The code should compile and be as small as possible to demonstrate your problem. People are normally happy to help provided that you give them something to start from. – Jun 30 '20 at 00:56