1. From the Customize section, go to Header Image Option.
2. From the Header Image Option, you will see the Current Header section where you can add an image.

• Header Image: Select the image for Header available on media library or upload from the other location.
  If the preview is fine, click on Save and Publish to apply the recently selected/uploaded image as a Header Image.
• Hide Image: This option allows you to hide the header image.
• Add Image: This option allows you to add the header image.
• Click the “Save & Publish” button to save changes.