Here's another tip for you NCs/admins and specifically for bloggers/writers, making your blog pages full width! I recall that this has been requested a while back by some NCs so why not give it a shot.
Layout A1 and A4
Layout B1 and B4
Layout B2 and B3
This tip is for the commonly used Design Studio. Code tested working on our test network (screencap below).
Example: Static Page here
Installation: Copy the code line by line, make sure to enclose it with the <script>tags or just download the attachment codes below and paste it to your custom code box.
Hope you'll find it useful.