Date: March 31, 2021
Summary
Updated March 31, 2021: We have updated Roadmap ID to point to the correct item. Thank you for your feedback.
We're excited to share that this coming release will enable SharePoint page authors and viewers to focus on a greater amount of page content by hiding the site header, site navigation, and global navigation bar with one click.
This message is associated with Microsoft 365 Roadmap ID 70800.
When This Will Happen
Rollout begins with targeted release (select user and organization) in late March and will be complete in late April.
GA begins rolling out in early May and will be complete by late May.
How This Will Affect Your Organization
Your SharePoint page authors and viewers will now be able to clean their field of vision and focus on page content by clicking the Expand content button on the command bar to hide the site header, site navigation, and global navigation bar.
This larger content viewing pane in Focus mode will continue as viewers navigate and select other links to open pages within the same site.
- The larger content viewing pane will not continue when viewers select links to pages outside of the site, even if they are within a hub site.
Focus mode collapsed view

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Focus mode expanded view

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What You Need To Do To Prepare
You might want to notify your users about this new capability and update your training and documentation as appropriate.