In the Action pane the actions the role has permission for are denoted with checked check boxes. The Reports pane lists all reports. The reports that the roles are allowed to generate are denoted by checked check boxes. Refer to the ITP/MDK Repository Manual chapter ITP/MDK Repository Reports for more information.
You can edit predefined roles like Deployer, DID developer, Model developer, Project creator, Project manager, and Viewer. Be aware that these roles form a system of permissions that cover the whole range of actions. If you do want to edit these predefined roles make sure that all actions are part of at least one role.