PSA: How to collapse a header but still show the table below that has no title

Sometimes you may want to have a collapsible introductory paragraph (e.g. instructions) that goes right before the table that has no title (e.g. a helper table for user-specific filters). However since there’s no H2 heading above the table, collapsing that paragraph above will also hide the table:

A neat trick is to:

  1. Add a horizontal rule (type --- then enter)
  2. Set that horizontal rule’s paragraph style to H2:

Voila, this H2-level rule will prevent the table from collapsing. It doesn’t show up in the outline either.