Dmx-class::notice-show used in a Wappler showcase - how is this done in Wappler?

Hi, I was admiring a Wappler showcase site today and looking at the code I noticed this (see below). Where is this found in Wappler? I would like to do something similar but I have not seen anything that adds a dmx-class::notice-show code element inside of my Wappler code.

Thx for any help in advance :smiley:

Community Page
Last updated: