To train a bird to step up, you can use positive reinforcement techniques such as offering treats, verbal praise, and gentle encouragement when the bird successfully steps onto your hand or a perch. Start by presenting your hand or a perch in front of the bird and saying a cue word like "step up" or "up." Use a treat to lure the bird onto your hand or the perch, and reward the bird immediately when it steps up. Consistent practice and patience are key to successfully training a bird to step up.