I see many people on here asking what exercises they should use to stimulate different parts of the chest i.e inner chest, upper chest, lower chest etc.
So I will show you the exercises that are best for stimulating particular parts of the chest.
To target the upper chest you should use free weights on an incline bench. The steeper you set the bench, the higher up the chest you will work. However in proportion to his the front delts will also begin working here.
Best Exercises - Incline Bench Press, Incline Dumbbell Fly
This one's pretty simple, to target the middle chest you should be doing flat-bench moves where you push against gravity, you can also use machines as long as you are pushing at 90 degrees against your body.
Best Exercises - Flat Barbell or Dumbbell bench press, Pec Deck Machine
To target your lower chest you should be doing decline bench moves. Of all major pressing angles, the decline has the shortest range of motion.
Best Exercises - Decline Press, Cable Crossover
To target the inner chest you should be performing close grip compound barbell movements. This will also work your triceps. Do cable and machine single-joint exercises where your hands come towards each other.
Best Exercises - Cable Fly , Dips with forward lean
To target the outer chest you should be performing wide-grip barbell moves, these will also work your shoulders.
Best Exercises - Wide Grip Bench Press
Good Luck with your chest routines.