Node Editor — Classes
This panel allows managing the classes associated with the node. A class is defined as a set of nodes of a network with an associated name. The concept of classes allows regrouping nodes having common properties and managing these properties globally. A node can belong to several classes at the same time. The classes can also be managed with the class editor.

The left list contains classes to which the node belongs. The buttons allow adding a class that already exists in the network, adding a new class that does not exist in the network, and deleting the selected classes.