Creating a subfeature
Create a subfeature to define a capability that extends another capability.
- In the header of Dev Studio, click the name of your current application, and then click Overview.
 - In the Features section, click the Switch to tree view icon.
 - 
        Expand the list of features and subfeatures to find a feature to extend.
        
You can create no more than four levels of subfeatures.
 - Click the name of the feature.
 - In the Subfeatures section, click the Create new feature icon.
 - In the Name field, enter text that uniquely identifies the subfeature.
 - In the Description field, enter text that describes the business value for this subfeature and what users can do when this subfeature is implemented.
 - Click Create.