\item Open/Create a Mixer Viewer from \texttt{Menu $\rightarrow$ Window $\rightarrow$ Mixer\dots $\rightarrow$ Mixer Viewer} (\texttt{Shift+M}).
\item Assign that Mixer Viewer (a white frame is shown when selected) to the one Video tracks (empty) and two Audio tracks, of the \#2 point, pressing the arrow icons (\texttt{Mixer}) you find on the Patchbay on the left of the Main window. When assigned, you must to see the 3 arrow (for 1video + 2Audio) are pointing up.
\item Now, you can use \texttt{Align Mixers} feature as usual. See \nameref{sec:audio_video_sync}
+ \item If you use the Viewer to make a clip and then try to "Open EDL" on that clip in the Resources
+Clip folder window, it will crash. Always use Open EDL with media on the timeline Main Program window.
\end{enumerate}