Hey, Elise,
Are you saying about product imahe 1920*700px, I have issues with product image and the size which you saying is i thin for banner.

2nd ) I am an administrator of the site but still not able to edit, some of attributes

HELP 3) Instead of product color swatches in single product page i want to show product main variant image as swatch. As of now it’s possible in product grid but not on single product level, can you please let me know how can i achieve that.