Comparison preview of the exported video

Since version 4 I can not see the (full) exported video in the preview window for comparison with the original video side-by-side within TVAI. Perhaps there is a way to do this that I am missing, or, if not, can this option be re-introduced please?

Thank you.

On the bottom right there are three vertical dots on window 1 and 2
Click those dots and you can set either window to “Set To Original”