Template can be found here: https://www.latextemplates.com/template/masters-doctoral-thesis
\usepackage{graphicx}
\begin{figure}[h!]
\centering
\includegraphics[width=0.7\linewidth]{Figures/Executiontime}
\caption[Execution time]{Execution time}
\label{fig:Execution time}
\end{figure}
it gives me an output like this
How i can change from FIGURE 4.5 to Figure 4.5 in small letters rather than caps