Abilities are the primary character actions used in the game. Activated from your ability hot bar or number ("hot") keys, abilities can be used to attack opponents, defend or heal allies, or increase character performance both in and out of combat. Abilities commonly require Action Points to activate. However, some career have abilities that do not require Action Points, and instead have special requirements to activate these abilities. Every ability is different, and frequently has different uses for different situations. Learning your career's abilities and when to best use them is key to mastering combat in Warhammer Online.
If you wish to go through each individual class abilities, plan your progression or share your builds with others, you can use RoR Career Builder
You can customize the number, orientation and general look of your Action Bars in the Interface menu: Main Menu -> User Settings -> Interface