OK, well, that still does t make sense to what I wrote but at least I now understand it and how it applies. Thanks.
When I’m on the iPhone, I open the picture up from the photos icon and click the edit button and use the crop feature. Once the cropping is done the picture automatically resizes larger. In this way, I can cut out all the sides of the photo that need not be in the picture. I’ll demonstrate below/ next post.