Shortcode for dummy image content using https://picsum.photos/
Activate and you're set!
Using the shortcode [picsum] returns a 200px x 200px image.
[picsum width=X height=X] - X being the value in pixels in which you want the image.
[picsum greyscale=true] - will return a greyscale image.
[picsum blur=true] - will return a blurred image.
You can use all the attributes together like [picsum width=550 height=200 greyscale=true blur=true]