Many sites use a right hand widget for inset text, recent posts/updates, and other additional data. However, it’s also possible to turn off the right hand widget.
This page has a Featured Image (1600 x 1200 pixels in original size) and has turned off the page title and the sidebar under the Document controls.
How to create this layout
The Classic editor’s implementation of the Featured Image may produce an image which is smaller than this, more like a thumbnail at the beginning of a paragraph. We haven’t modified the Classic editor’s version from the WordPress default.
The Gutenberg editor’s implementation of the Featured Image behaves as shown on this page and documented below.
If you’re currently seeing Block options because you’re working in the page body, click Document (to the left of Block) in order to see the Featured Image controls.
You may also need to click the down arrow to expand the Featured Image area.
A gray Set Featured Image box will appear:
When you click the gray box, a pop-up window will let you either upload a new image or select from your media library. We recommend using your media library to manage consistent alt text and captions across your pages.
In addition, you’ll want to scroll further down the Document column and click the Suppress Page Title checkbox.
Finally, if your site has a sidebar turned on by default, you’ll want to choose Hide Sidebar on this page. (This sidebar control is available in both Classic and Gutenberg editors: )