Go to Classes to view, edit, and add classes and attributes.

To add a class, select New class, enter a name, and choose a color. Assign attributes to your class if you want it to be more detailed.

Select New attribute group and give it a name. Enter an attribute and select +. You can add multiple attribute groups and attributes.

Check Allow multiple selection if the attributes can exist within an object simultaneously. When you do that, you’ll be able to assign multiple attributes to an object. For example, if your annotated object is a black and orange car, choose both black and orange from the attribute group.

Do not check Allow multiple selection if the attributes can’t exist simultaneously. For example, a dog can’t be small and medium at the same time.