OK, I got a bit excited. My apologies for being a bit rude. I had a task I'd been putting off, so I was frustrated in my good intentions. This morning, things seem to be back to normal. For the record, it is a Win 10 Home machine, v 1803, os build 17134.829. product version is 1.7.0.367. I was using my Wacom tablet and stylus. Periodically I do have problems with the tablet, particularly with the cursor not updating to the correct one for the tool being used. A reboot generally fixes things. For now I will get back to work. If I have further problems that seem related, I may post again. Thank you for your attention to my problem.