title_body: Kindle Create and full page images
upvoted_answer: In general, there is not a software solution to this problem because you have to design a responsive solution that works in various display sizes. Fixed layout solutions like Kindle Create may work in one display but not others. It is designed for simple ebooks; images involve some sophisticated css. 
  
  I wrote a code solution for the problem of image size on Kindle: https://www.reddit.com/r/selfpublish/comments/991c1h/what_is_the_ideal_image_size_for_kindle/e4t5oca/