1. Go to Canva.com and click Create a Design

  1. Select custom size

  1. Select the correct width and height ( 810 (width) x 1215 (height)

  2. Drag your cover into the empty image field

  3. Make big until no white remains

  4. Click download

  5. Change file size to jpeg and download.

  6. Go to tinyjpg.com and upload this image. Download the minimized version. Upload to form.