Well, Mac, I never did see Plank on our list of items -- but that's okay.
I went forward anyway, and put in your code, cp plank.d'sesktop ~/.config/autostart
And then I rebooted, and, presto, it worked! I now have Plank working, and auto-starting at reboot.
Mac, thank you very, very much. You did it. It's working. Also special thanks must also go to rmj65 for assisting us here, as well as for PCNetSpec for sharing with us the idea of Plank in the first place.
Thank you, Mac, and thank you rmj65 and PCNetSpec. I needed a lot of help with this one.
I'm delighted with our very handy, and resource-light, tool called Plank.
What a score!

perknh