Microsoft Word was not designed for book formatting. It was designed for business documents, academic papers, and letters. But it’s what most authors have, it’s what most manuscripts are written in, and with enough patience, you can produce a print-ready PDF from it.

This guide walks through the complete process — page setup, styles, section breaks, headers and footers, font embedding, and PDF export. It also covers, honestly, where Word’s limitations make the process harder than it needs to be, and when a dedicated formatting tool like Cambric starts to make more sense.

Before you start: save a formatting copy

Before you touch any formatting settings, save a separate copy of your manuscript file. Name it something like MyBook_Interior_Format.docx. Do all your formatting work in this copy. Keep your clean manuscript file untouched.

If formatting goes sideways — and in Word, it sometimes does — you can always go back to the clean copy and start over. This is not paranoia. It’s experience.

Step 1: Set up your page size

Word defaults to 8.5” x 11” letter paper. Your book is not 8.5” x 11”. You need to change this to your actual trim size.

  1. Go to Layout > Size > More Paper Sizes (or File > Page Setup on Mac)
  2. Set the width and height to your trim size (e.g., 5.5” width, 8.5” height for the most common indie fiction size)
  3. Apply to: Whole document

If you’re not sure which trim size to use, our trim sizes guide covers every option and which genres use which.

Important: Set the page size first, before anything else. Every other formatting decision — margins, font size, line spacing — depends on the page dimensions.

Step 2: Set up mirror margins

Print books use mirror margins because the spine alternates sides on facing pages. Word supports this, but you have to enable it.

  1. Go to Layout > Margins > Custom Margins
  2. Under Multiple pages, change the dropdown from “Normal” to “Mirror margins”
  3. Set your margins:
    • Inside: 0.75”–0.85” (this is the gutter, the spine side)
    • Outside: 0.5”–0.65”
    • Top: 0.6”–0.75”
    • Bottom: 0.7”–0.85”
  4. Set Gutter: to 0” (when using mirror margins, the “Inside” margin serves as the gutter — the separate Gutter field is not needed and will cause confusion if set)

The inside margin must be wider than the outside margin to account for the binding. The bottom margin should be slightly larger than the top — a centuries-old typesetting convention that makes the text block appear visually centered. For a detailed explanation of why these numbers matter and what KDP requires, see our book margins and gutter guide.

The most common Word margin mistake: Setting the Gutter field to your desired gutter width while also using Mirror margins. This adds the gutter on top of the inside margin, making your inside margin enormous. When using Mirror margins, set Gutter to 0 and use the Inside field for your gutter width.

Step 3: Set up paragraph styles

This is the single most important step, and the one most authors skip. Word’s styles system lets you define how each type of text looks — body text, chapter headings, first paragraphs — and apply that formatting consistently throughout the book.

If you’ve been formatting by manually changing fonts and sizes paragraph by paragraph, styles will save you hours and prevent the inconsistencies that make a book look amateur.

Body text style

  1. Go to the Home tab, find the Styles panel
  2. Right-click the “Normal” style and choose Modify
  3. Set these properties:
    • Font: A professional book serif — Garamond, Palatino, or Georgia (see our best fonts guide for detailed recommendations)
    • Size: 11pt for a 5.5” x 8.5” trim, 10.5pt for 5” x 8”
    • Line spacing: Set to Exactly 15pt (for 11pt font) — this gives you 1.36x leading, which is comfortable for fiction
    • Alignment: Justified
    • Indentation: First line 0.3”–0.4” (standard paragraph indent for books)
    • Space before/after: 0pt (books don’t add space between paragraphs of the same type)
  4. Check “Automatically update” is OFF — you don’t want Word changing your style every time you adjust a single paragraph

First paragraph style (no indent)

The first paragraph of each chapter — and the first paragraph after a scene break — should not be indented. This is a universal typesetting convention.

  1. Create a new style (click the small arrow at the bottom-right of the Styles panel > New Style)
  2. Name it “First Paragraph” or “Body First”
  3. Base it on your body text style
  4. Change only: First line indent to 0”

You’ll apply this style manually to the first paragraph of each chapter and after each scene break.

Chapter heading style

  1. Modify the Heading 1 style:
    • Font: Your heading font at 20–24pt (can be the same as body font in a different weight, or a complementary sans-serif)
    • Alignment: Centered
    • Space before: 180pt–220pt (this creates the “sink” — the blank space above the chapter title that pushes it to the lower portion of the page)
    • Space after: 24pt–36pt
    • Page break before: Enable this (under Format > Paragraph > Line and Page Breaks > Page break before) — each chapter will automatically start on a new page
    • Keep with next: Enabled — prevents the heading from being stranded at the bottom of a page without body text following it

Scene break style

  1. Create a new style called “Scene Break”
  2. Set alignment to Centered
  3. Set the font and size to match your body text
  4. Set Space before and Space after to 12pt–18pt each

Type your scene break marker (three asterisks, a centered rule, or a decorative glyph) and apply this style. Using a visible marker is important — a blank line between paragraphs can disappear at a page break, making the scene transition invisible. Three centered asterisks (* * *) is the simplest reliable option.

Step 4: Apply styles throughout the manuscript

Now comes the tedious part. Go through your entire manuscript and apply the correct style to every element:

  • Body text for regular paragraphs (most of your text)
  • First Paragraph for the first paragraph of each chapter and after each scene break
  • Heading 1 for chapter titles
  • Scene Break for scene separators

For a 300-page book, this takes 30–60 minutes. It’s repetitive, but there’s no shortcut. If you skip this step and format manually, you’ll have inconsistencies — slightly different spacing here, a different indent there — that accumulate into a visibly uneven book.

Tip: Use the Navigation Pane (View > Navigation Pane) to jump between chapters. Since Heading 1 is a recognized heading style, your chapters will appear in the navigation list.

Step 5: Set up section breaks for page numbering

Books use different page numbering in front matter and body text. Front matter uses lowercase Roman numerals (i, ii, iii) or no visible numbers. Body text uses Arabic numerals (1, 2, 3) starting at Chapter One. To do this in Word, you need section breaks.

  1. Place your cursor at the end of your front matter (after the copyright page, dedication, etc.)
  2. Go to Layout > Breaks > Section Breaks > Next Page
  3. This creates two sections: Section 1 (front matter) and Section 2 (body text)

Now set up numbering for each section:

Section 1 (front matter):

  1. Double-click in the footer area of a front matter page
  2. In the Header & Footer toolbar, click Page Number > Format Page Numbers
  3. Set Number format to lowercase Roman numerals (i, ii, iii)
  4. Set Start at: i
  5. If you don’t want visible page numbers on front matter pages (common), simply don’t insert a page number — leave the footer empty

Section 2 (body text):

  1. Double-click in the footer area of a body text page (Chapter One or later)
  2. Important: Click “Link to Previous” to deselect it — this unlinks the body section’s headers/footers from the front matter section
  3. Click Page Number > Format Page Numbers
  4. Set Number format to Arabic (1, 2, 3)
  5. Set Start at: 1
  6. Insert the page number (usually centered in the footer, or alternating outer corners)

For a complete guide to which pages go in front matter and which go in the body, including the correct order, see our front matter and back matter guide.

Step 6: Set up headers and footers

Professional books have running headers (the text at the top of each page showing the author name, book title, or chapter title) and footers (typically just the page number).

The odd/even convention

In print books, left-hand (even) pages and right-hand (odd) pages have different headers:

  • Even pages (verso): Author name on the left side
  • Odd pages (recto): Book title (or chapter title) on the right side
  • Page numbers: Centered at bottom, or placed on the outer edge of each page

To enable this in Word:

  1. Double-click in the header area
  2. In the Header & Footer toolbar, check “Different Odd & Even Pages”
  3. Also check “Different First Page” (chapter-opening pages traditionally have no header)
  4. Set up each header type:
    • Even page header: Your name, left-aligned, small size (8–9pt), often in small caps or italics
    • Odd page header: Book title, right-aligned, same size and style
    • First page header: Leave blank (the first page of each chapter should have no header)

The catch: “Different First Page” in Word applies per section. If you want every chapter’s first page to have no header (which is the professional standard), you need a section break at the start of every chapter. That means going through your entire book and inserting a Section Break (Next Page) before each chapter heading, then unlinking each section’s headers and re-entering the header text.

This is one of the most labor-intensive parts of Word formatting. For a 30-chapter book, you’re managing 30+ sections, each of which needs its headers configured individually. If you later change the header text (say, you change the book title), you need to update it in every odd-page header across every section. Dedicated formatting tools like Cambric handle odd/even headers and chapter-opener suppression as a single setting — no section breaks to manage at all.

Step 7: Handle chapter openings

A professional chapter opening typically includes:

  • A drop cap on the first letter of the first paragraph
  • Extra white space above the chapter heading (the “sink”)
  • No running header on the chapter-opening page
  • A distinctive chapter heading style

Word supports drop caps: place your cursor in the first paragraph, go to Insert > Drop Cap > Dropped. Adjust the number of lines (2–3 is standard) and the font if desired.

The sink (white space above the chapter heading) is controlled by the “Space before” setting in your Heading 1 style. A value of 180–220pt pushes the heading down to roughly the upper third of the page.

Word’s limitation: You cannot apply different drop cap styles to different chapters without manual intervention on each one. And if you edit the text in the first paragraph, the drop cap may need to be re-applied.

Step 8: Choose and embed your fonts

Your font choice affects every page. For detailed recommendations by genre, see our best fonts guide. The short version: use a professional serif (Garamond, Palatino, Caslon) at 10.5–11.5pt for body text. Avoid Times New Roman — it was designed for newspapers, and it marks your book as unformatted.

When exporting to PDF, all fonts must be embedded. If they’re not, KDP and IngramSpark will reject your file, or the printer will substitute a default font.

To ensure embedding in Word:

  1. Go to File > Options > Save (Windows) or Word > Preferences > Save (Mac)
  2. Check “Embed fonts in the file”
  3. Optionally check “Embed only the characters used in the document” to keep file size smaller

Then when exporting, use File > Save As > PDF (or File > Export > Create PDF/XPS on Windows). In the PDF options, verify that fonts will be embedded.

A warning about system fonts: Some fonts installed on your computer may have licensing restrictions that prevent embedding. If Word can’t embed a font, it may silently substitute another font in the PDF. Always open your exported PDF and check that the fonts look correct.

Step 9: Generate a table of contents (non-fiction)

If you’re writing non-fiction, you need a table of contents. Word can generate one automatically from your heading styles.

  1. Place your cursor where you want the TOC (typically after the copyright page)
  2. Go to References > Table of Contents
  3. Choose a format, or use Custom Table of Contents for more control
  4. Set it to show 1 level (just Heading 1) for a simple TOC, or more levels if you have sub-sections

The TOC uses the page numbers Word assigns, which means it will reflect your Roman numeral / Arabic numeral section setup. Update it (right-click the TOC > Update Field > Update entire table) as a final step before export.

For fiction, a table of contents is optional and usually omitted. Readers don’t navigate novels by chapter number.

Step 10: Export your PDF

This is the final step, and it’s where many authors discover problems they didn’t catch on screen.

  1. File > Save As (or Export) as PDF
  2. If given options, choose “Standard (publishing and printing)” quality, not “Minimum size”
  3. Open the exported PDF in a PDF reader (Adobe Acrobat, or even a browser)
  4. Check every page:
    • Are fonts correct? (Not substituted)
    • Are margins consistent?
    • Do chapter openings start on new pages?
    • Are headers and footers showing on the right pages?
    • Is the page count even? (KDP requires even page count)
    • Are there any widows or orphans? (Single lines stranded at the top or bottom of pages)

If the page count is odd, add a blank page at the end.

Run through the full 35-item formatting checklist before uploading. It catches the issues that are easy to miss after staring at the same manuscript for hours.

Where Word falls short

Word can produce a functional print interior. What it cannot do well:

No live page preview. You can’t see realistic facing pages as they’ll appear in print. Word’s print preview is an approximation, and it doesn’t show the physical proportions of your trim size accurately. You won’t see the book as a reader sees it until you upload to KDP and order a proof.

No automatic widow and orphan intelligence. Word has a widow/orphan checkbox, but its implementation is crude — it pushes lines to the next page without considering the cascading effects on subsequent pages. The result is often pages of uneven length that look worse than the widows they were trying to fix.

Manual section management. Every chapter needs its own section for proper header suppression. In a 30-chapter book, that’s 30+ sections to manage. Change one header and you may need to check all of them.

No professional scene breaks. Word can center three asterisks, but it can’t insert decorative scene break ornaments, and it can’t detect when a scene break falls at a page break (which would make it invisible to the reader). Professional formatting tools handle this automatically.

No integrated template system. In Word, every formatting decision — font, size, spacing, margins, chapter style, scene break style, drop caps — is set manually and independently. There’s no way to say “make my book look like a professionally designed contemporary novel” and have the tool apply a coherent set of design decisions.

DOCX-to-PDF quality. Word’s PDF export is functional but not optimized for print. Font rendering, kerning, and spacing in the PDF may differ slightly from what you see on screen. Professional typesetting tools generate PDFs that are designed for print production from the ground up.

No EPUB export. If you need an ebook version, Word cannot produce a clean EPUB. You’ll need a separate tool and a separate formatting process, which means maintaining two versions of your book’s formatting. Cambric exports both print-ready PDF and EPUB from the same project — one manuscript, two formats, no separate workflow.

When Word stops being enough

Word works for authors formatting their first book who want to understand the fundamentals. The process above will produce a manuscript that KDP accepts and that looks reasonable on paper.

But if you’re publishing more than one book a year, writing in series, or finding that the manual formatting process takes more time than the writing — there’s a reason dedicated book formatting tools exist.

The limitations above aren’t bugs in Word. They’re the natural consequence of using a general-purpose word processor for a specialized production task. Word does many things well. Professional book typesetting is not one of them.

For an honest breakdown of the specialized alternatives and what each one does better, see our comparison page. If you want to skip the manual process entirely, Cambric is a $109 one-time-purchase desktop app with 20+ professional templates, Typst-based typesetting, and a live preview that shows your actual book pages at your actual trim size. It imports DOCX files directly, so the manuscript you already have in Word is your starting point.

Cambric handles every step in this guide automatically — mirror margins, section breaks, Roman-to-Arabic numbering, chapter sink, drop caps, scene break detection, odd/even headers, font embedding, and live preview of your actual book pages at your actual trim size. If you’ve been through the Word formatting process once and decided life is too short to manage 30 section breaks by hand, that’s exactly the problem it was built to solve.