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Click Save As to save the search filter so that it can be used to pull in all associated test cases when creating a test cycle.
When creating the Test Cycle, this is what it looks like to add Test Cases using the search filter:
Assigning Test Cases to a tester:
Once test cases have been added to a Test Cycle they must be assigned individually. Click on the test case and assign to each user. Make sure the test case is in a status of "To Do" so that each tester knows the test case is ready to be executed.