Hello!
1) I would like to make the body of the post (where the text is) wider, and the sidebar widget narrower, and want it to be centered. I do not want to affect the dimensions of my homepage or any other pages.

2)I want to add two photos side by side in a post, but I do not want them to be responsive or to have the thin border around them that comes up when I add them as a gallery. Is this possible? I've attached an image with the border that I'm referring to.