While a modern SharePoint page looks nice, there are times where you may want to maximize the amount of content you can view on your screen (like if you’re working on a small laptop). Focus mode for modern SharePoint pages allows you to click on an icon and hide the site header, site navigation, and global navigation. Here’s how it works…
Here’s a home page on a Team Site. I want to see more of the page content and less of the navigation, so I click on the outward arrows icon in the upper-right corner:

The site header is now hidden, along with the left-side navigation. That extra space is now used to display the page content. In order to return the page to its normal format, just click on the inward arrows icon in the upper-right corner:
