You can customize the way the web interface looks and functions through the use of Velocity templates.
Please note, however, that while Velocity as a technology is supported by CollabNet, Inc., the customizations themselves are not supportable. Any future upgrade of TeamForge may, in fact, break your customization. Furthermore, making these types of changes to your installation is considered a customization and will impede our ability to support you. Should you experience issues and open a ticket with Technical Support, you may be asked to remove these customization to debug your issue.