[Tex/LaTex] Change beamer margin for images

Question

I want to insert image that covers entire beamer tile, no margin or extra white space is desired.

Current MWE

 \documentclass[12pt]{beamer}
    \usetheme{CambridgeUS}
    \usepackage[utf8]{inputenc}
    \usepackage{amsmath}
    \usepackage{graphicx}
\begin{document}
    \begin{frame}{Title}
    \begin{flushleft}
    \includegraphics[scale=1]{CtrlSM1.pdf} 
    \end{flushleft}
    \end{frame}
\end{document}

This gives me,

But what I desire is,

I have tried,\begin{flushleft} Image \end{flushleft}, \hspace{-5mm}
and\vspace{-3mm}

Can you please suggest some modifications.

Answer 1

You don't need flushleft, just put the picture in a box of textwidth width. Make sure the height is also suitable, I don't have your PDF to check.

\documentclass[12pt]{beamer}
    \usetheme{CambridgeUS}
    \usepackage[utf8]{inputenc}
    \usepackage{lmodern}
\begin{document}
    \begin{frame}{Title}
    \makebox[\textwidth]{\includegraphics[width=\paperwidth]{example-image}}
    \end{frame}
\end{document}