I would like to write out a keyboard shortcut in a sentence, in plain text. This could be in any font - monospaced, or not - but there is no text formatting (color, size, weight), dingbats, or anything like that. For example, if I want the write Ctrl + Enter, I could write:
- Press Ctrl+Enter to submit the form
- Press Ctrl + Enter to submit the form
- Press CTRL + ENTER to submit the form
- Press [Ctrl] + [Enter] to submit the form
Are there any standards for how to write keyboard keys in plain text?