1. Upload the image to the image library.
  2. Select Site Explorer > Forms.
  3. Click the Pencil icon to edit the form in question.
  4. Expand Presentation Elements > Drag and drop the Image element onto the form.
  5. Hover over the newly added image section, click the Pencil icon to edit.
  6. Select Insert image > Search for image from image library.
  7. Click Save