To use test case review system for your project, go to "Settings" menu and select "General".

On general settings page, use the toggle button "Enable Review System". This will provide an option to users adding a new test case or editing existing ones to get their work approved by a reviewer. But it would not be mandatory for them to get test cases approved after every add or edit operation.

Once the review system is enabled, you would notice that the second checkbox "Approval is mandatory" would be made available for selection, that means with this you can set whether all the add and edit operations on test case would need to be compulsorily approved by a reviewer or not.

When approval is made mandatory, you would be required to select the user who will be the primary reviewer for the test cases in the project. This means whenever there is an operation (like bulk update, bulk copy, copy and revert) where user performing the operation cannot specify the reviewer for test cases being affected then the user selected here will be considered as the default reviewer.

Optionally you can also select a secondary reviewer, the user who will be considered as reviewer if the above mentioned operations are being performed by primary reviewer.

You can see the key difference while adding a new test case:

Here you can see that selection of a Reviewer is mandatory.

The Reviewer field is available on add test case form but user has option to not to send the test case for approval.

If you want the comments posted during the review process to be made available after the review is done, enable the "Add Review Comments on Test Case after Approval" option. This will merge the review comments with the comments added for the test case, and they will be shown in the test case comments section of the test case view pane.

Based on whether you want a review system to be available for the current project and how the approval process would work, all thea bove mentioned options can be set.

Note: