Installing and Using SQL Server Books Online (Report Manager)
SQL Server Reporting Services Report Manager includes page-level help that explains the purpose of each page and describes its options. Page-level help is a small part of the product documentation that is available.
The complete SQL Server documentation set is available online in the SQL Server library on MSDN or you can install SQL Server Books Online on your computer by running Setup from the SQL Server installation media. After installation is complete, you can access the documentation through the Start menu.