The Accordion component allows you to display content in foldable-unfoldable blocks.
In Order to add content to an accordion, you can drag&drop widgets to the Drop zone:
Custom Background Color Sets the background color of the content.
Note that to set the menu colors you must use the general property “Background Color” and “Text Color".
Accordion Items. With the + and - buttons, you can add or remove blocks and set the menu title.
You can reorder the blocks if needed directly in the list by drag and drop.
Expanded. Allows you to define whether the selected item appears initially deployed.
Expanding or Collapsing Accordion Items from the Editor will change automatically the Expanded attribute
Bootstrap Reference: https://getbootstrap.com/docs/4.0/components/collapse/