Click Existing System .
Select the position in the PPR tree where you want to insert the system.
The Insert Existing System dialog box appears.
Select the From Session tab, and click Retrieve
Loaded Data.
The systems already present in the session are listed.
Note:
It is also possible to select an existing system from database. In that case, select the From Search tab and launch a search according to your desired criteria.
Select the desired system in the list and click OK.
The selected existing System (along with its associated operations) is inserted into the PPR tree.