A build can be put in testing mode when at least one requirement, test suite or standalone test case has been added to the build. In the build details window, if the build is still in setup mode, click on the Setup In Progress button and select Release for testing from the dropdown. This will allow a build to be ready for testing mode. Once a test session has started, you will be unable to revert the build back to setup mode. However, additional requirements/test suites/standalone test cases can be added to a build so that they can be included in future test sessions.
Users will need view and edit permissions in the test coverage module to perform this action. Depending on the settings of a users project permissions, users may be able to view all project builds or just a subset of them. Project owners manage the permissions for project members.