> maybe the link should be in the form of a question mark icon, similar to what they have at https://m.xkcd.com/
If the help text will be displayed in a little floating window like a tooltip, this makes sense, as the expected UI. I had in mind a short description box opening up underneath the entry and showing the info (as part of the page flow, not floating), and for that case I had the expander arrows [1] in mind.
In either case, the important thing IMO is to have enough interaction area to comfortably click on it without having to precisely hit the arrow/question mark itself.
If the help text will be displayed in a little floating window like a tooltip, this makes sense, as the expected UI. I had in mind a short description box opening up underneath the entry and showing the info (as part of the page flow, not floating), and for that case I had the expander arrows [1] in mind.
In either case, the important thing IMO is to have enough interaction area to comfortably click on it without having to precisely hit the arrow/question mark itself.
[1] like mentioned here: https://ux.stackexchange.com/a/5736/138