When readers only need a few key pieces of information: If readers only need some information on a page, then an accordion can help them more easily and efficiently find the information they're looking for.

You can use any HTML element to open the accordion content. We prefer a button with a w3-block class, to span the entire width of the page (100% width).

Go to accordion item which you want to keep open, In Properties there is setting "StartsExpanded", Set it to True