Formatting
You can format the text using headings, styles, links, and images—just like in a regular text block (Click here for more information about editing text)
Under the Settings tab, there is an additional field for Backgroundcolor which lets you change the background color of the expandable section. To give the content in the expandable area some extra space when a background color is applied, you can add extra spacing under the Padding fold-out.
Icon settings
To indicate that a piece of text can be expanded to reveal more information, you can use an arrow icon, for example to collapse again.
In the Icon Settings, you can configure which arrows you want to use, their color, size, and position.