How to Format Book Pages and Set A5 PDF Page Size
Question details
The user wants to format book pages, set margins, and create an A5-sized PDF for publishing, and needs to know if Adobe Acrobat can change the fundamental page format.

- Product
- Adobe Acrobat / PDF
- Device & OS
- not provided
- Scenario
- Formatting a book layout and exporting it to an A5 PDF for publishing.
- Observed behavior
- The user is unsure how to set the A5 page size and margins, and whether Acrobat or the original authoring software should be used for fundamental layout changes.
Ensure you have access to the original authoring application (such as Microsoft Word or Adobe InDesign) where the book was written, as fundamental layout changes must be made there.
Set Page Size and Margins in the Original Authoring App
The best practice is to set your A5 page size, margins, and book layout in the software used to write the book before exporting to PDF.
PDFs are designed to preserve the structure of the original document. Adobe Acrobat is not intended to redesign a document's fundamental format. Therefore, structural formatting must be completed in the original application (like Word or InDesign).
Launch the application you used to write the book (e.g., Microsoft Word) and open your manuscript file.
Navigate to the Page Layout or Design tab, select 'Size', and choose 'A5' (148 x 210 mm or 5.83 x 8.27 inches).
In the Page Layout tab, click 'Margins' and select 'Custom Margins'. Set appropriate margins for a book, ensuring you include a 'Gutter' margin for the binding.
Once the layout is finalized, go to 'File' > 'Save As' or 'Export', and choose 'PDF' as the file format to create your A5 PDF.

Use WPS Office to Format Book Pages and Export to PDF
WPS Writer provides professional page layout tools to set A5 page sizes, adjust book margins, and seamlessly export your manuscript to a high-quality PDF for publishing.
- 1. Open your manuscript in WPS Writer: Launch WPS Office and open your book document.
- 2. Set page size to A5: Go to the 'Page Layout' tab, click 'Size', and select 'A5' from the dropdown menu.
- 3. Configure book margins: Click 'Margins' under the 'Page Layout' tab, select 'Custom Margins', and set your top, bottom, inside, outside, and gutter margins.
- 4. Export to PDF: Click the 'Menu' button, select 'Export to PDF', configure your export settings, and save your A5 book PDF.

Frequently Asked Questions
Can I change the page size of an existing PDF in Adobe Acrobat?
While Acrobat Pro allows you to crop pages or adjust page boxes, it is not designed to reflow text or change the fundamental page size (like converting A4 to A5) without distorting the layout. It is always best to change the size in the original source document.
What are the standard dimensions for an A5 book page?
An A5 page measures 148 x 210 millimeters, which is approximately 5.83 x 8.27 inches. It is a very common and popular size for self-published books and novels.
Why can't I edit the page layout in Adobe Acrobat Reader?
Adobe Acrobat Reader is a free application designed solely for viewing, printing, and annotating PDFs. It does not include advanced editing or page layout features, which are reserved for paid software like Acrobat Pro or original word processors.
What is a gutter margin in book formatting?
A gutter margin adds extra space to the inside margin of a page (where the book is bound). This ensures that text isn't lost in the binding or spine of the printed book.




