So, I “fixed” it by making the MBP screen the primary monitor. I remember now why I had made the large center monitor the primary: screen shots and notifications now show up on the MBP rather than the larger screen. Since the smaller monitor is the right-most, and I’m often working on the left-most and center screens, I will miss notifications etc. if I’m not paying attention. I may change it back to see if Teams will stay on the smaller monitor.
I also noodled with Mission Control’s Spaces. Currently I have 1 for each monitor. I didn’t create any new ones for simplicity’s sake. I have a pretty good filing process, developed over years, organized by project, and know where all my files are. I feel having additional desktops will unnecessarily complicate things. I work on multiple projects any given day, jumping between Illustrator and Photoshop, Adobe CC, font managers, Chrome, Teams, Outlook, Excel, PowerPoint, SharePoint and server, etc. And I have plenty of monitor real estate to work with.
That said, I will look into Spaces further to see if I can gain additional efficiencies. When it first came out, it came with big changes to the OS, so I kept everything as it was. There was enough to learn with the new OS. I’m still upset that I can’t control system fonts, but that’s for another day. 😤