Sometimes, you want to adjust the site width for a much wider view of your content. You can set the page width of the site from the Super Theme Designer in the Layout section.
Alternatively, this can be set using custom CSS. This is how to change the max width of the site.
:root {
--max-width: 990px!important;
}
.max-width {
max-width: var(--max-width) !important;
}