How To Configure The Collapsible Text Box Widget
Firstly, drag your collapsible text box widget onto the canvas.
Drag a text box onto the canvas and enter some text into the text box. With the text box selected, open the Paragraph Styles panel and create a new paragraph style with a name of your choice.
Open up the widget options panel and enter the paragraph style name of your choice.
Your widget will now be set up and working.