I figured it out, it’s working! The monitor I needed is launched by the icon that looks like a small 2-pin power plug (3rd icon from the right on the bottom line that has build and program icons). That pulls up a window that has all the expected serial information from the program I compiled and uploaded.
I was under the (wrong) impression that the Platform IO Terminal was the same window as the Serial Monitor.
Thanks again for your help.
Ted