I hope everyone is well and hopefully this will be the 1st of many posts as I continue to build on the Flame Learning Channel 
Today’s short Flame Capsule shows you the various ways to set up video tracks as the Primary and Secondary track for image comparison. This could be for on-line to offline comparison or even the progression of a VFX or look on different tracks.
Use either the viewing options or right-click menus to set what you see in the viewport.
You can check out this video and more on the Flame Learning Channel.
Stay safe and enjoy!
Grant