LiveCycle Designer ES provides visual cues that identify fragment references in the Layout Editor and the Hierarchy palette. These visual cues provide information about how fragments behave.
A fragment icon appears in the upper-left corner of a fragment reference and uses the color of the object boundary borders. The objects within a fragment reference have gray borders to indicate that you cannot edit them from the fragment reference.
Livecycle frag ref Fragment references
You cannot select any of the objects in a fragment reference. For example, if the fragment reference contains a table, you cannot select a row or column. To select objects in a fragment reference, open the fragment source file for editing.
Livecycle fragments.33.5.2 Fragment references
You can move a fragment reference and its contents as a single entity within the Hierarchy palette in the same way that you move other form objects. However, you cannot drag objects into a fragment reference.
See also 

Fragment references