Crafting trainers, found near their respective crafting stations, provide information about the functionality of crafting and facilitate switching active crafts. You can only have two active crafts at a time. There is no charge to switch to a new craft, but if you want to switch back to a craft you have previously leveled, you will be charged coins. Crafting trainers also explain what items can be made with their craft, which is valuable for determining which crafts will work best for your profession. For example, Warriors would benefit more from Armorsmith than from Tailor.