I am trying to widen the content margins to roughly occupy 75% of the screen on all pages but the static home page of my site. In addition, I would like to edit my slider so that it will display images that are 940 x 500 pixels. The images that I have up right now are 940 x 500 but sometimes the whole image doesn't appear because the recommended image size is 956 x 350.
My site is andtheparade.com and a link for a page that I want to edit the margin of is andtheparade.com/collections/
Thank you for your time and thank you in advance to any help.