In sub requirements, a full product specification sheet of a software can be specified in chapters and sub chapters. These allow you to divide your chapters into standalone requirements. They can be assigned to different users and have different status, test cases and defects. So you will be able to monitor your process. In the end, you can merge everything together in one document, which can include all executed test cases, closed and known defects, and calculated parameters.
Start by opening a single requirement and click on Subrequirements in the navigation bar.
Here, you can create new chapters. Click on to create a new sub requirement. We can specify this in Chapter 1.
If you want to create chapter 1.1 mark Chapter 1 on the left-hand side and click on Add. The new chapter will automatically be a sub chapter.
If you want to edit these chapters select it from the list on the left. The hierarchy can be changed using .
to create a new sub requirement. We can specify this in 
.