To add a feature of a part, select a part, go to the detail tab and click on "Create feature" in the Skr category.
After clicking on the
Create Feature button, a new object should be created in the editor and in the Feature array, one element will be added.
To remove a feature, select the green feature object in the 3d view and delete it.
After deleting it, go to the associated part to remove empty references in the