Tooltips on images

Hey all, I am looking for a little guidance to reconstruct a feature I found on the following site:

Scrolling down to the section where there’s an interior photo with + signs that when clicked, an overlay with text displays - what is that element/function called? the name escapes me and I can’t seem to hit on anything to research it. If there’s any examples of that within webflow I would greatly appreciate being pointed in the right direction.


Here is my site Read-Only: don’t have one as yet.