How can you learn to control your anger?
Through conscious and repeated practice.
All our habits and skills are the result of our repeated actions. Our daily actions shape our emotional and mental dispositions. If you feed your anger through impulsive reactions, you reinforce this tendency and make it harder for yourself to stay calm in the face of future provocations.
If, on the other hand, you make a conscious decision to curb your anger, you will gradually weaken this habit.