You can use ShortPoint to add full width section to a Modern or Classic SharePoint pages using these easy steps.

Before we begin

To use the solution described in this article you need to be a ShortPoint User and have ShortPoint installed on your SharePoint sites.

Modern Page

Classic Page

1. Edit any Section (or Background element) that you would like it to take the full width of your screen

2. Choose the Force full screen width option

You are done :) 

Note: the support for full-width column is not available only in release ShortPoint SPFx (v6.1.0.0), all versions higher than should have the support for full-width columns ready in SPFx.