I have a very old, robust website that uses Articles Anywhere on about 800 pages. The syntax used throughout included DIV tags and styles to format the article titles inside a decorative box. We also used these tags with multiple articles and Joomla tags as well.
Here is an example of the syntax we used on a single article:
{article title="Eagan at a Glance" class="button size-32 fancyboxes"}[link][div class="button size-32 fancyboxes"][title][/link][div class="boxestext"]Population, Demographics & Data[/div][/div]{/article}
The [div] tag is no longer supported (it was deprecated on J3 for a long time too).
You can simply replace them with actual <div> tags in the HTML view of the article.