You can embed a PDF in an image and in a similar fashion, you can link the uploaded image to an external link. To do so:

  1. Hover over the image in the text editor. A Cogwheel Icon would show.
  2. Click on the Cogwheel Icon. The Edit Image pop up would appear.
  3. Enter the URL that you would like to embed.
  4. Finally click outside the text editor until you see the borders turn blue to save the changes you made.