You can use fragments to reuse content in multiple forms. When creating a form design, you insert a reference to an existing fragment and the fragment appears in the form design.
When you update a fragment, all forms that reference the fragment reflect the changes when you open or save the form in LiveCycle Designer ES. If you update a referenced fragment after you save a PDF form, the old fragment is still visible when you view the PDF form in Acrobat. To update the fragment that is visible in the PDF form, you must resave the PDF form in LiveCycle Designer ES
To insert a fragment from the LiveCycle Workbench ES repository:
1.
In the LiveCycle Workbench ES Resources view, select the file that contains the fragment to insert.
See also 

To insert a fragment reference