screen-layout

This sounds like a BOM-Error or encoding error due to file transfer in filezilla. See this post for more information. BOM Error

The most common way to handle this is to create a “full-width” page template in your theme. This will be a near duplicate of your page.php file (if we are talking about WP Pages, not posts or a custom post type) without calling in the sidebar. Looking at the structure of your page.php file, locate … Read more

My web designer figured it out. Migrated all the custom coding from the child theme to the main theme and disabled the child theme.

The widths of the preview window in the Customiser when selecting the tablet and mobile device previews are 720px and 320px respectively. These are only defined in CSS, so there’s no hook or anything for specifically overwriting those sizes. The original styles are defined in /wp-admin/css/themes.css, and look like this: .preview-mobile .wp-full-overlay-main { margin: auto … Read more