What is a gutter margin?

The gutter is the extra margin space on the inner edge (spine side) of each page. It prevents text from getting lost in the binding. Important notes: Most formatting tools calculate gutter margins automatically based on trim size and page count.

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What is a proof copy?

A proof copy is a printed version of your book you can order before it goes live for sale. It helps you: KDP lets you order author proofs at printing cost. IngramSpark offers proof orders during setup. Always check a proof — it’s your last chance to spot errors before the world does.

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What does Expanded Distribution mean?

Expanded Distribution lets your book reach libraries, academic institutions, and bookstores outside of Amazon. Through Amazon KDP: For wider reach with more control, authors often use IngramSpark alongside KDP.

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