To add a photo to the cover of the Cover Photo page, click on the Select your file button and select the photo to upload.

For best results, upload an image of 1,950 * 450 pixels or larger.
After you finish editing your profile, click on the View My Profile button to return to your personal account on your page. If you want to replace the cover, then upload a new file, or click Delete My Cover Photo to delete the current cover.