Body part priority: have different exercises for A/B/C workouts

I use the Body Part Prioritization feature. It adds a chest exercise to the end of each workout. It seems to always be Diamond Push-Ups, no matter the Level in the Dr Muscle workouts. When I leveled up, I wanted to change the Prioritization exercise to rotate exercises like the A/B/C workouts do. 

I was trying to get some variation in the exercises. In part from some mild boredom, but I thought it might be nice to follow the philosophy of alternating through some separately tracked exercises targeting the same body part, like the rest of the exercises in the program.