Use this window to view a summary of all registered compatible units, or to enter a new compatible unit. It is possible to add a compatible unit within a compatible unit structure by adding a parent compatible unit ID. By right clicking you can get to the detailed view. With the right click option Disconnect parent it is possible to disconnect the parent from the compatible unit marked.
Create 
Compatible Unit Revision
Manage 
Compatible Unit Revision
Create Compatible Unit
Enter 
Complementary Information on Compatible Unit
Connect to 
Parent Compatible Unit