New Perk/Skill Slots
Skills or Perks are acquired when your Crew achieves a 100% training level. When a new Perk or Skill is available, it will be indicated by a "+" on the bottom-left of your Crew icon. You will also receive a notification about assigning a Skill/Perk to your Crew when returning to the garage.
Swapping a Perk or Skill
Players are able to swap their chosen Crew skills or Perks for new ones for a fee of 10 gold. This swap can only occur when the Skill or Perk has reached 100% training.