Each of these fields are at the top of your character sheet and are freeform text fields where you can enter any values you want. For races and classes, the system includes special logic to recognize the races and classes available in the SRD. For example, if you enter "Fighter" as your class, you'll have the base stats of a Fighter and will be able to import powers from the Fighter compendium. Similarly, if you enter "Paladin / Commander" or "Rogue Wizard", you'll receive base stats based on the multiclass rules, and you'll be able to import powers for either class. The system will strip out all special characters, so you can use any convention you want to separate your class names when multiclassing, such as commas, slashes, or just empty spaces.