- Don’t use icons, always spell out the key name
Symbols like ⇧, ⌥, ⌃, and ⇪ are just confusing for those who don't immediately recognize them.
- Use sentence case for each key
That is, capitalize the first letter of each key name, even if it's two or more words. E.g., Shift, Down arrow, Command.
- Use the + sign with spaces between key names
That is, Control + Shift.
- Use (on Mac) and (on Windows) when the key names differ
That is, Control + Shift (on Windows) or Command + Shift (on Mac).
To copy an element, press Command + C.
I'm so glad they didn't use that confusing ⌥ icon.