Motivation:
  - I frequently look for this in the docs then struggle to rememeber
  the name of the function I need to find in the api docs. Also I think
  other people may benefit from it being easier to find.

Changes:
  - Added a section about Collection Checkboxes to the docs.
Co-Authored-By: NEileen M. Uchitelle <eileencodes@users.noreply.github.com>