This isn't your old dumb or feature phone, when selecting a pic for your homepage you have to take into account all of the screens. You should notice that the picture moves just a little from side to side as you scroll through the pages, it's not the same exact pic each page. So your pic will have to be much longer than tall to get all/most of the pic you want in the crop.
I stand corrected. I really hasn't looked at it only thinking of what my Inc did. Plus I haven't changed the stock wallpaper. Now I feel like one of those people who urk me by not answering the question posted but some other something that wasn't asked. Hey but I did revive the thread to get you an answer, so hopefully that counts for something, and I learned a little too.