Thank you for your response.
I had tried all of the available selections under image size selections for Single Posts. I tried all of them again with the same disappointing results. For example, if I select 150×150 it still blows the image way up but it is all pixelated so I went back to selecting the size uploaded. The image on the post page must be at least 1024×1024 if not larger. When I look at the source file it just shows ‘automatic’ which would indicate that the setting that needs changing is somewhere in a file that needs editing to a specific preferred size or percentage.
Gene