This option allows you to quickly show the AAP column (the default) to see which boxes are checked for a record, or hide it, to get more space for filling out text.
While in a record or a template:
The checkboxes in the AAP column are very important for adding identifying attributes to an Authorized Access Point (AAP) for a Work, Expression, Person, Family, or Corporate Body or a Composite Key for a Manifestation or Item, to make the heading unique.
While in a record or a template:
See the following for more details about the AAP Checkboxes: