Thank you Greg.

AFTER you responde yes (if you are member of sysadmim or DB_onwer), then people can start create Diagramms because the objects are created.

1- Where are the objects created? are they all created in the Master database? or are they created in the User database where i reply with a yes?

2- AFTER a member of the sysadmin or DB_owner responde yes, who can create diagramms? only persons belonging to this two roles?

Thank you.