I can't remember who it was who told me about this, but thank you anyway.
I find I need to use odd characters from time to time, but it's difficult to recall the ALT-key shortcuts for anything other than regularly used ones. Up until now I've used the Character Map provided in Windows, tedious to get to it and to use. But this is a much better way.
Go to CopyPasteCharacter.
This is so much easier to use, providing of course you bookmark the site. All you need to do is click on a character and it will copy it, or hold down ALT to click and copy several. They don't have the full range of characters but they have anything I'm likely to use, not to mention others that I'd love to use, if only I knew why ‽ ※