Aw shit, I missed it.
Suffice to say that Robboe is 100% correct. You can in no way target (isolate nor emphasize) different parts of the pectorals major; whether it be upper or lower, inner or outer, 35 longitudinal or 35 latitudinal...it CANNOT be done.
Rather than focus my efforts on tearing down all the BS in this thread, I'll tell you what you CAN do. Enough of what isn't possible, what CAN you do in regards to muscle shaping? Unfortunately, there isn’t much you can do to change the shape of individual muscles, but what you can do is make these weaknesses less apparent. For example, if your upper chest appears to be underdeveloped then bringing up the pectorals minor and anterior deltoids, as well as increasing the overall size of the pectoral major will lessen the obviousness of this. You can also bring weak body parts up to par with stronger body parts through specialization/prioritization of your training. For example, if your arms are underdeveloped and your legs are overdeveloped then by focusing on your arms by putting more stress on them while simultaneously putting less stress on the legs (by decreasing training volume, intensity, etc) your arms, in time, will become less of a weakness compared to your legs. There is also the much more extreme option of surgery. Through surgery we can alter the origins are insertions of our muscles which would consequently change their shape. This practice has been shown to create very large decreases in muscular strength, coordination, mechanical function, motor unit activation, among other things. This basically means that although the shape of your muscle will be changed it will be at the expense of the proper use of this muscle, which isn’t a very good trade-off for those interested in bodybuilding and/or strength training. When it is all said and done, trying to change the shape of your individual muscles in a complete waste of time because it quite simply just is not possible. Your efforts should be focused on increasing the size of your muscles (muscle hypertrophy), the strength of your muscles, nervous system, and other strength promoting factors and when needed reducing fat mass.