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The end of support for Win7 in January was my main reason for upgrading to Win 10.
Thanks for your comments, Alice. The "right click" on the desktop worked fine on Win7 and allowed tweaking of just about everything on the desktop. This feature has only very limited functionality in W10. Some apps can be put on tiles on the W10 desktop by clicking on their "Pin to Start" option but this doesn't seem to work for desktop shortcuts and in any case the font / font size appears not to be tweakable.
(As I said, unless I am missing something.)