Text box next to a text element?

hello,

id like to add some type of information, when the cursor is moved on a specific link. Eg an email address, or a phone number, when the link contains the tel: or email: , but also some additional information, that can’t be written directly on the document, but should appear when the cursor is on the

a bit like, when on some form, there is a text box, and on the right, just next to it, there is a interrogation mark, as click on it is not needed, but when cursor is on it, it shows a text infobox directly, to show some additional information

how could i do that on LO writer? (without macro)

thank you vm