Updated cover.md

loren authored
revision df00fecd0f1a73ff58a6451115d85e8079d2695c
# cover.md

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Cover Images

PDF and ePub books (or documents) can have cover images. To set a cover image, upload a file named `cover.png` or `cover.jpg` to your images folder. This image will be set as the book's cover image when published. If a cover image is not uploaded, a basic title page is used by default.

### Dimensions

Cover image dimensions should match that of your book. A _technical_ or _business_ book cover image should be 8.5 x 11 in, while a _fiction_ cover image should be 6 x 9 in. If you change the dimensions of your book via project settings, be sure to upload an appropriately sized cover image. It's important to have the correct proportions, as a misproportioned image will yield undesired white space on the cover.

### Resolution

For highest quality, a resolution of 300 pixels per inch (PPI) is recommended. Resolution can be set when exporting a file in Photoshop or Illustrator.

- 8.5 x 11" at 300 PPI is 2550 x 3300 pixels
- 6 x 9 " at 300 PPI is 1800 x 2700 pixels

Lower resolutions can be used (the image will be scaled to fit), but may result in a blurry or pixelated cover image