Interaction appear on click

Does anyone know the video @Araminta did where clicking on an element made another appear? It was a blue section, i cant recall the name or find it.

Want to use a button to click on and make a contact form appear, not really a popup.

Guessing it’s one of these two tips you are thinking of:

Thanks found it!

I had a (sort of) same question lately:

Maybe this helps too