Certain functionalities of the IBM Cognos BI environment can also be changed and customized as per your requirements. You must be careful to move the changes done in the system.xml files in some previous versions of Cognos. The following areas can be focused on while customizing Cognos functionalities:
Customizing IBM Cognos Connection
Customizing the login page
Changing the default Query Studio template
Customizing server-side printing
Enabling the Query Studio to start in the safe mode
Customizing date formats
Customizing the CSV output format properties
Customizing the auto-size feature for search and select prompts
Customizing Batch Report Service and report services
Customizing error handling for the SMTP mail server
Disabling the Report E-mail Attachments feature
Customizing scheduling
Changing default file extensions for Excel 2002 spreadsheets
Customizing the printing styles for Excel 2007 reports
Disabling or enabling the Web Page, RSS Feed, Image, Text, and My Inbox features.
A detailed description is available on the Cognos BI 10.2 documentation website by searching for Customizing the functionality of IBM Cognos software on the link provided at the end of the Customizing the appearance section.