Treat page numbers as important printed content when checking margins. Inspect their actual placement in the exported paperback file on both left and right pages, using the current requirements for the chosen layout. A footer setting in the editing application is not proof that every number has sufficient clearance.
Locate the number’s printed position
A document editor may describe footer placement using a distance from an edge or a separate layout control. The resulting number can still sit differently from the body text. Inspect the actual numeral and its surrounding space rather than assuming that the body margin setting governs everything on the page.
Use the intended trim size as the reference for the finished book. When bleed is part of the file setup, distinguish the final trimmed page from the larger exported page boundary. This prevents a misleading clearance check that measures from a boundary the reader will not see in the finished copy.
Check left and right pages independently
Mirrored page layouts may place numbers at opposite outer corners, while other designs center them. Inspect both sides of a spread. A correct position on a right-hand page does not prove that the corresponding left-hand footer inherited the intended alignment or spacing.
Look at pages from several sections, especially after chapter breaks or changes in page setup. Different section settings can leave one group of pages using an older footer position. Record the affected section so the correction fixes its layout rule rather than moving one number while leaving the others unchanged.
Include wider numbers in the sample
A single-digit number occupies less horizontal space than a three-digit number. If the design places numbers close to an outside boundary, inspect the wider cases as well as the opening pages. Decorative separators or a chapter label beside the number can change the total footprint further.
Check the actual combined element rather than only the center of the numeral. A number may appear safely positioned while an adjacent line or label extends into a problematic area. The review should cover everything the footer prints, including any ornament introduced by the page template.
Use current requirements for the actual book
Consult KDP's current trim, bleed, and margin guidance with the final page count and intended layout in hand. Apply the relevant requirements instead of reusing a remembered measurement from a different project. Recheck the setup when the book's specifications change during revision.
This article's inspection method does not supply a universal footer measurement. It helps you verify the particular file against the applicable requirements. Keep the source and review date in the production record so a later editor can see which guidance informed the layout decision.
Inspect contrast and nearby content
Clearance is only one part of a usable page number. Check whether a background image, decorative band, or nearby caption makes the number difficult to distinguish. When the page design changes across sections, a treatment that works on ordinary text pages may fail on illustrated pages.
Decide intentionally where page numbers are omitted, such as a designed opening page, and keep the numbering sequence coherent. Do not confuse an intentional omission with a missing footer caused by a section break. Record exceptions so reviewers can evaluate the actual design rather than guessing why a number disappeared.
Verify the exported file after correction
After adjusting the footer, export the publication file again and inspect the affected pages plus representative pages elsewhere. Confirm that the correction preserved alignment, numbering, and any cross-references that depend on pagination. A repaired source setting is only an intermediate result until the output has been checked.
Use the available publication preview and an appropriate physical review to assess the finished reading experience. Keep the verified file identified in the handoff. If another export replaces it, repeat the relevant check instead of relying on approval attached to a different version with potentially different page geometry.
Frequently asked questions
Clear answers for this publishing decision.
Does setting the body margin automatically protect page numbers?
Do not assume that it does. Footers can use separate positioning controls or section-specific settings, so inspect the printed number and related elements in the actual output.
Why check several number lengths?
The printed footprint changes as numbers become wider. A design that looks comfortable with one digit may place a longer number or adjacent decoration too close to an edge.
Should every page display a number?
The design may intentionally omit visible numbers in some places. Keep the sequence coherent, document the exceptions, and distinguish those choices from accidental losses introduced by section settings.
Which trim size, page count, margins, and bleed setting work together for my paperback?
Check the complete combination first: a trim size, ink and paper type, and page count must be a supported KDP set, and the page count then fixes the minimum inside margin and whether the interior needs a bleed page size.
Set the format in a book project