With the collapse element, you can contain content that can be toggled within vertically-formatted collapses.

You'll find the "Collapse" element available when creating a new element, and by clicking the collapse element type, you'll find templates to choose from as a starting point.

Once you've created the collapse element, select the collapse element and in the builder panel to the right, you'll be able to manage the collapse titles.

To add content with a collapse, click it in the builder canvas and it will open. You can then drag new elements and format the collapse's layout and style.