Project sub-requirements are regular requirements that usually cover some specific elements of the application under test and are logically related to a broader project requirement.
To create a sub-requirement or to see the list of sub-requirements of any given requirement, in the Requirements List or in the Project Requirements pane, click on the name of an appropriate requirement and then go to the Sub-Requirements sub-tab. Project sub-requirements can be created, moved, or deleted the same way as requirements.
To view or edit a sub-requirement, click the “+” icon located next to the name of an appropriate requirement and then click on the name of the sub-requirement that should be viewed or edited. The rest of the editing procedure is described in the Edit Project Requirements section of this Help.