Use sections in conjunction with harnesses to define the appearance of user forms, rule forms, or composite portals.
A section defines the appearance and contents of one portion of a form.
Work information and functionality are grouped into sections by context and purpose. Each section can be included in other sections so that you can reuse them in a variety of contexts.
The Pega 7 Platform contains many standard harnesses and sections that you can copy and tailor to meet your application needs.
Layouts organize properties and controls within a section.
Layout cells contain properties, labels, controls, or other sections. There are various types of layouts that dictate how cells are arrayed. Layouts can be automatically converted into a sections so that they can be reused in other harnesses, sections, or flow actions.
3. To simplify, Layouts structure the content within sections. Every section contains at least one layout.
In flow actions we add a section which may consists of one or more layouts/sections.