To Single Content
Step 0 – Navigate to the Appearance section of the WordPress dashboard, then select Customize.
Step 1 – In the Customize menu, find and click on Additional Content.
Step 2 – Locate and click on the option labeled Single Content within the Additional Content settings.
Step 3 – Customize the Single Content section, such as adding additional text, shortcode and other content elements specific to the header area. which appears after and before the single content.
Step 4 – Once have configured the Single Content, click Publish to save changes.