Open the final ebook in more than one reading application and test common font sizes. Confirm that chapters begin correctly, the contents links work and images scale without hiding captions. Review special characters, scripture references, footnotes and any interactive links.
Use the platform’s preview tools but do not rely on a single automated check. A human review catches awkward breaks and confusing navigation that software may miss. Save the tested file as the approved edition so later uploads do not accidentally replace it with an earlier draft.