Changing Image Size Inside Post

Hi,

I want increase the sizes for images inside posts on my site. I would like to have images presented at the size they are uploaded at… Currently they are being reduced.

So, I visited Settings > Media and adjusted the size for the medium and large images.
How do I adjust the max size for the “original size” images?

I haven’t found that changing any of the sizes (medium or large) has made any difference. The image in my post is still the same.

The image I am uploading is 2000 x 3000 and it is showing up with a lot of white space on the left and right side. Shouldn’t this be filling up the post area? ( I know this is huge, but I wanted to see if making the image larger did anything. )

Is there somewhere else that is setting the MAX SIZE of images in this theme?

Thanks!!!