A module represents a collection of requirements. However, as a requirement needs to be assigned to a module, the creation of module is mandatory.
Prerequisites: the Hierarchy view is active.
Right-click in the hierarchy view.
Choose New > New Module. - Outcome: the dialog "New module" will open.
Enter a name for the module.
Optionally, enter a description.
Click on Browse to choose a module type or create a new one by clicking on the plus symbol.
Click on Finish.
Outcome: a module was created and added to the Hierarchy view.