1. To add a new class to the Classes list, click Add Class.
2. The classes have an arbitrary color by default.
   
2. To change the color of a class, select the class and click on the colored rectangle next to Color.
3. You see the Color Selection dialog.
3. Select a new color from the list.
4. To change the opacity of the labels within the image, adjust the Opacity slider.
5. To rename a class, double click on the class entry and enter a new name. Press Enter or click on Save icon to save the new name. Note that you must not use the name Root for one of your classes as this a reserved keyword from the image analysis.
6. To delete the selected class, click Delete Class.