I'm new to Display Function. I had 2 Windows both with separate task bars at the bottom of each on one stretch monitor. I know longer have that set up. How can I retrieve that?

Is this what you want to do?
https://www.displayfusion.com/Discussions/View/working-with-monitor-splits/?ID=44152bec-fda4-42ef-a636-e40c7c4813fc