Use
You want to enhance an IMG structure without changing the original structure. As the enhancement is not made in the original system, the IMG structure remains unchanged in the original system even after an Upgrade.

A company has its own implementation guide which it wants to put in the SAP Reference IMG.
An Industry Business Unit (IBU) wants to enhance the implementation guide with its own application areas.

You can only enhance the structure which you are processing with the enhancement transaction. If you go into lower-level structures and change them, they are modified.
Implementation guide enhancement conditions:
Prerequisites
At least one IMG structure exists. IMG structures are created with the transaction SIMGH. See
Creating an IMG structure.
Activities
The IMG structure is displayed.
Create an IMG structure.
Result
The IMG structure is enhanced, without changing the structure in the original system. You cannot distinguish between a new node in the enhanced IMG structure and an original structure node.

If the company already has SAP System or Release update implementation project IMGs or project views, they must be regenerated after enhancing the IMG structure.
Regenerate any project IMGs or project views in the project management (SPRO_ADMIN). See
Change project IMG.