Hello,
I have a similar question about the widths. I have been trying to solve it for hours but I just gave up and decided to ask your kind assistance. I just want to customise some of my pages’ width. I want to make their widths the same as the original first page width, which is 810px, and I want the rest pages to remain to have 700px width as default. I would highly appreciate your prompt response. Thank you very much in advance.