How to make it Cover Photo

-Click on the image you want for your Facebook cover Photo.
-Save this image (right click on it and 'Save image/target as')

To add a cover photo to your timeline:
  1. Go to your timeline
  2. Click Add a Cover
  3. Choose whether you want to upload a new photo or pick a photo from one of your existing photo albums
  4. Once you choose a photo, you can reposition it by clicking on the image and dragging it up or down
  5. Click Save