Callout
The Callout snippet creates a coloured box (red, yellow or blue) with additional content, for example:
.

To edit the box content click the small dots on the snippet panel, then click Edit.

The pop up menu allows you to set the box colour, heading, subheading, and text content:

Note the text Content field includes format buttons which allows you to format the text and add horizontal line break (look for the button appearing as a dash - ).