Part Modeling > UDFs and Groups > Operations on Groups > About Working with Groups
  
About Working with Groups
After you place a UDF on a part, all features belonging to the UDF, become a group. The following feature operations treat groups as a single feature. 
Delete
Ungroup
Group
Suppress
Rename
Edit
Edit Definition
Pattern
 
* To pattern a group with external references in Assembly mode, the parent assembly must be in session.
To Replace, Disassociate, or Update a group, click Model > Operations > Replace or select the group, right-click, and click Replace.