Some documentation clearly shows what keys are required to perform a task. The Atom Flight Manual (for the Atom editor) is one example.
On this page, the manual tells you to press ctrl + left to move left one word. The keypresses (ctrl + left) are clearly shown in a shadowed box.
I've looked at the CSS to make this happen. Before I start cobbling something together on my own, is there a macro or other add-in to do something like this?
Yes, I have searched for keypress, keystroke. Most searches return results on how to assign macros to keystrokes.