03-04-2023, 04:45 PM
Quote:I'm hopelessly un-technical.....and......Just hope the book's cover will look ok! I published three paperbacks back in 2017 with KDP's template but never had this problem.
Well hope reigns
and if the image was first created by Gimp 2.10 it might just be OK, it depends on your graphic.The page about resolutions is here: https://www.gimp-forum.net/Thread-Image-size-in-Gimp
but in pictures, if you started off using real-world units say millimetres in Gimp 2.10 the default is 300 pixels-per-inch (ppi) and placing that in the 600 ppi template means you scale up x2
If you have a legacy image from your Gimp 2.8 then that used a default of 72 ppi Put that in the template and you need to scale up 600/72 = x8.33 and that will blur the image.
What to look for when making a canvas. If starting from scratch for the KDP template, increase the 300 ppi > 600 ppi before drawing.
Why does KDP use such a high ppi value of 600 ? Not sure, but from previous posts on KDP it is very picky about sizes and works to 3 decimal places. Gimp works in pixels and 600 ppi is a better approximation to the millimetre sizes.