1. Sign in to your WordPress admin dashboard.
2. Click 'Media' and 'Add New.'
3. Click 'Select File,' browse to the banner you want to use on your hard drive and double-click the image. The image loads to your site.
4. Highlight and copy he text in the 'File URL' field. This is where your picture is located on your site. Click 'Save All Changes.'
5. Click 'Appearance' and 'Editor.'
6. Click 'Header.' In the PHP file, scroll to find the '#Header' tag. Look for the URL of the current banner in the text. Delete it and add the URL to the banner you uploaded.
7. Click 'Update File.'