Can anyone tell me how to make a contextual menu item for applying "strikethrough" to text, for all Mac programs including TextEdit? Maybe some kind of simple automator instructions for it?
I can't say with 100% certainty, but if the program does not include a strikethrough font (if that is how it is done), you would have to first add it to the software's repertoire, which might be no easy feat.
You may find assistance in customizing a contextual menu with one of these two links.
On a Mac since 1984. Currently: 24" M1 iMac, M2 Pro Mac mini with 27" BenQ monitor, M2 Macbook Air, MacOS 14.x; iPhones, iPods (yes, still) and iPads.