APStylebook.com Help Center topics
Can I format my custom stylebook material?
Yes, AP Stylebook Online provides a WYSIWYG (What You See Is What You Get) text editor for your custom entries and notes which provides the ability to stylize your content.
You can also use HTML to format your custom entries and notes. Examples include: <b>bold type</b> and <i>italic</i> text.
Please consult the User Guide for more information.