As you can see from my reply to alternaut, I can now appreciate it's function.
There are still some items in A/M that I have no idea what they are, however, ignorance is bliss so they say. As for the circumstances, I don't recall exactly what I was doing. Not much help I'm afraid.
Thanks artie, jaybass



OS 13.6.6 iMac (Retina 5K, 27", 2017, 3.4 GHz Intel Core i5, 24 GB RAM, 2400 MHz DDR4. SuperDuper. 1 TB Lacie HD