Complete documentation libraries for P6 Professional releases are available from:
https://docs.oracle.com/en/industries/construction-engineering/
The documentation assumes a standard setup of the product, with full access rights to all features and functions.
Help System Access
P6 Professional is configured to access the versions of the help systems hosted by Oracle. However, downloadable versions of the help systems are also available if you need to download, deploy, and access a local copy.