It'd be really helpful if there was an option to expand and collapse the table of contents included on the right side of the articles. For example, initially the Table of contents will show only the titles with marked with H2, and when we click one of those titles, the titles marked with H3 should appear. It will improve our user experience by a lot if we want to move quickly within the same article. (See https://bhn.document360.io/docs/20964)