The Topline statement lives directly underneath the Story Headline
Once you start populating your Topline statement, you will notice a counter at the bottom right that will count down as you're typing from 215 characters. It will, however, not stop you from adding a Topline statement longer than 215 characters but only serve as a guide.
You can style Topline statement text as Bold, Italic, Underline, Superscript, Subscript, & Add a Hyperlink by highlighting the desired text within the Topline statement.
Notes:
The Topline label is a permanent fixture and cannot be edited.