Ok basically my problem is that the upper-inner portion of my chest is flatter than the bottom portion. I have been doing incline pressing for some time now, both high incline and low incline and I have noticed the outer portion of my pectoral muscle get a lot bigger (the area where the armpit is) but if i go closer to the center of my body my pec gets flatter.
I attached an image to help illustrate my point. Basically the blue circle indicates the portion of my chest that is flatter in comparison to the black circled part of my chest. Any advice? I know the more weight I press the fuller my chest will look but I was just curious as to see if there are any good exercises I could be doing to help target this specific area.