Image shows the Traits page of the API Designer where you defined resource traits. The top of the image shows the icons for Export Raml Document and Enter RAML Source Editor Mode. Below the buttons is the New Trait button. Below that button are the Delete Trait (X) button and the text fields for the Trait Name and the Usage field. Next to the Usage field is the link to the trait definition page where you can enter code to define the trait. Below the Trait Name field is the Description field.
The function of these fields is described in the surrounding text.