The position of a class inside a node tree can be changed on the class edit page. If we want to change the position of a class within the folder in which it is located one place up or down, we will do so by highlighting the class in the table and pressing the appropriate button 'Up' or 'Down' on the toolbar on the right. Another way to switch classes is to move the class to any location within the node tree. This is done with the "drag and drop" technique: by pressing and holding the left mouse button on the class we want to move, we drag it to the desired location, and when it is in the place where we want to move it, we release the left mouse button. The class will be moved to that location, and if a class with the same identifier already exists in that folder, the identifier of the transferred class will be adjusted.