To create a form that has a flowable layout, you must organize the sections into subforms to merge with data. Subforms are objects that act as containers for other objects, including fields, boilerplate objects, and other subforms. They help to position objects relative to each other and provide structure in form designs that have a flexible layout.
Livecycle select items in hierarchy for header Organizing the form
Type Header and press Enter.
Livecycle select items in hierarchy for footer Organizing the form
Livecycle hierarchy collapsed Organizing the form

Organizing the form