Hi Glen and Curt --
I thought I had posted a reply last night but it apparently didn't take.
First, thank you both big time for all the time and effort expended - VERY MUCH APPRECIATED!! Curt, I took your advice and created a completely new pdb from scratch, duplicating the structure of my problem database without the two DB Popup fields. The New/Edit record screen was working fine. I then added, one by one, the DB Popup fields and tested New/Edit and all went smoothly.
At that point I entered hours of frustration and confusion ;-( There were several things getting in the way of my being able to successfully export and import records. The hardest to diagnose and correct was caused by at some point my having changed the ORDER of the fields so far as how they displayed. I had a good idea what was going on when the records' "time" kept showing up in the "Note" field.
I think I identified some features and functions which are missing from HDB Mac Desktop. I was lost so deep in the "forest" last night that I was never quite sure when I was at fault and when I was being hamstrung by the software. One thing might be that Mac Desktop does not support filters -- I could see SORT but filters were hidden. I also have not seen how I can set the sync procedure for an individual database: I am used to being able to leave all PDBs as syncing, setting one PDB to "device overwrites desktop", for example. I could not figure how to do that when syncing the phone and MacBook Air M1 ....I wanted the newly created PDB to be "copied", I just had to be sure that it was okay if ALL the PDBs on the phone overwrote ALL on the DeskTop.
I am still recovering for my late night battle. I am 98% sure that all is well. I am going to check for the other PDB (and maybe others) I had found that had the same "edit window too large to fit on the screen" problem. I have to admit that if the PDB(s) is not of critical importance I will most likely just delete it (them) vs. getting into an hours long battle.
Again! Thank you for your patience and support!! Jim