Haha! I do have some helpful clues. I was just thinking about writing an Ode to Control + Z for MuddyUm--did you know that (well, it's command on a Mac)/Control + Z will undo that accidental delete you just did on your Medium story? I found that out last week! So helpful.
Moving on, :)--text boxes are where we copy and paste a link and the rectangular text box shows up (I may be using the wrong term-I'm not techy either).
Hyperlinks are where we underline some text and highlight to add the link to the story as an underline. I think it just helps most pieces look cleaner in their aesthetic. Personal preference that I'm going with over at Age of Empathy.
Please let me know if that makes sense/you have any questions. :)