Clicking the 'Add' button on the toolbar of the class edit page will add the newly generated class to the folder where the class marked in the table is located. The class change window will open, which is described in detail in the 'Class change' chapter.
Clicking the 'Insert' button will add a new generated class within the folder marked in the table. If the selected class is not a folder, then it will be converted to a folder. As with adding a class, a window for changing classes will open, which is described in detail in the chapter 'Modifying a class'.