I am on booster theme. I find on widescreen displays, product collections are bunched in the middle and there is white space on the side (which I want), but the header and slideshow images stretch the entire width of the screen. Is there a way to adjust so the header/slideshow width is the same as the width of the collections (so the entire site is more 'vertical') rather than some things stretched out, and some things bunched in the middle. It looks okay on smaller aspect ratio screens, but it really bothers me for larger widescreens.
Thank you in advance.
Please provide website url and if your store is password protected then also provide password
If you do that, your header will look like this
Still if you wanted to do this, below is the code
Go to sections -> header.liquid, find code in the below screen shot and add selected class