On the home screen library, you see a list of all your novels. By default, stock images are used to fill in empty novels, but what if you already have a cover designed, or want to add in a placeholder of your own?
To add a cover to your novel...
Click on your novel.
Click on the cog icon in the top left of your novel
Upload your cover to the metadata section.
Crop your image
Voila! Your image is now visible as a thumbnail in your library.
