\begin{enumerate}
\item To define a mask, in the Compositor window click on the \textit{Edit mask} icon to get the popup Mask menu. If the menu does not come up, click on the \textit{Show tool info}.
\item On the video, LMB click on the place where you want to start a mask.
\begin{enumerate}
\item To define a mask, in the Compositor window click on the \textit{Edit mask} icon to get the popup Mask menu. If the menu does not come up, click on the \textit{Show tool info}.
\item On the video, LMB click on the place where you want to start a mask.