change up
• engage a higher gear in a vehicle or on a bicycle.
• "what you notice with a diesel is the need to change up slightly earlier than in a petrol car"
• make something different or do something differently.
• "he needs to change up his entire training routine"
change-up
noun
• an unexpectedly slow pitch designed to throw off the batter's timing.
• "the pitcher can add a change-up to his fastball"
