Field sets
Field sets combine the power of Visualforce to create custom user interface pages with what has always been a defining trait of the Force.com platform: the ability for administrators to customize the application using config over code.
A field set is a grouping of fields. For example, you could have an account search Visualforce page that uses a field set to control which account fields are returned in the search results. When a field set is added to a Visualforce page, developers can loop over its fields and display them. The same Visualforce page can therefore be used to present a different set of information, depending on which fields you wish to render.
Field sets enable you to customize the fields that appear on a custom Visualforce page using a simple drag-and-drop interface to add, remove, or rearrange fields from the field set without altering the Visualforce page, as shown in the following screenshot:
When a field is included in the Available for the Field Set section...
