DIY Cover design instruments like Canva can be helpful for mockups or social networking images but almost never match Expert benchmarks for print. . Set the inside margin (gutter) generously — KDP requires larger sized gutters as website page depend rises, so Check out KDP’s margin desk in your book’s https://whitemagicstudios.co.uk/blog/best-book-illustration-services-milton-keynes-for-educational-books/