PDF Editing Issues

How to Include an A3 PDF Page in an A4 Document

Amos GikundaAmos Gikunda Oct 28, 2026 868 views

Question details

The user wants to combine a larger A3 PDF page into a standard A4 PDF document without losing the A3 dimensions.

How to Include an A3 PDF Page in an A4 Document
Product
PDF Editor
Device & OS
not provided
Scenario
Merging documents with mixed paper sizes, such as inserting an A3 Visio chart into an A4 PowerPoint presentation, for improved readability.
Observed behavior
The user needs a method to merge the files while preserving the original individual page sizes, ensuring the A3 page is not forcibly scaled down to A4 within the digital document.
Before you start

Ensure both your A4 document and your A3 page are saved as separate PDF files locally on your device before starting the merge process.

Solution 1Recommended

Use Adobe Acrobat to Combine Files

Adobe Acrobat allows you to merge multiple PDFs while retaining their native, individual page dimensions.

When merging PDFs, modern PDF editors are capable of preserving individual page sizes within a single document. This means an A4 page and an A3 page can sit side-by-side in the same file.

1
Open the Combine Files tool

Launch Adobe Acrobat and click on 'Tools' in the top menu, then select the 'Combine Files' option.

2
Add your PDF files

Click the 'Add Files' button and select both your A4 PDF document and your A3 PDF page from your computer.

3
Rearrange the pages

Once the files are loaded, drag and drop the page thumbnails to place the A3 page exactly where you want it in the A4 document flow.

4
Merge the documents

Click the 'Combine' button in the top right corner. The resulting PDF will retain the mixed A4 and A3 page sizes natively.

Use Adobe Acrobat to Combine Files
Printing Mixed Sizes: When printing the combined document, ensure you select 'Choose paper source by PDF page size' in your printer properties so the printer automatically switches between A3 and A4 trays.
Advanced PDF Tools

Merge PDFs of Different Sizes with WPS Office

WPS PDF provides a seamless way to merge multiple PDF files, including documents with varying page sizes like A3 and A4, while keeping their original formatting and readability completely intact.

  1. 1. Launch WPS PDF: Open WPS Office and navigate to the 'PDF' tab on the main dashboard.
  2. 2. Select Merge PDF: Click on 'Merge PDF' from the top toolbar or the PDF toolkit menu.
  3. 3. Upload your files: Click 'Add Files' to import both your A4 document and the A3 PDF page.
  4. 4. Arrange and Merge: Drag the thumbnails to put the pages in the correct sequence, then click 'Merge'.
  5. 5. Save your document: Once the process completes, click 'Save' to export your newly combined mixed-size PDF document.
Combine PDFs of different page sizes without unwanted page scaling.Fully compatible with standard Adobe PDF and Microsoft Office file formats.Intuitive drag-and-drop interface for rearranging pages.Lightweight, feature-rich PDF editing suite for everyday document tasks.
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Frequently Asked Questions

Will the A3 page shrink to A4 when viewed on screen?

No, if combined using standard PDF merging tools, the digital PDF will preserve the original dimensions. When scrolling through the PDF in a viewer, the A3 page will appear noticeably wider and taller than the surrounding A4 pages.

How do I print a PDF that contains both A4 and A3 pages?

In your print dialog box, look for an option called 'Choose paper source by PDF page size' and check the box. This prompts your printer to pull A4 paper for the standard pages and A3 paper for the larger charts, provided your printer has both paper sizes loaded.

Can I permanently resize the A3 page to A4 later if needed?

Yes. If you decide you want all pages uniform, you can use the 'Print to PDF' feature within your PDF viewer. Set the page scaling to 'Fit to Printable Area' and select A4 as the paper size, which will digitally shrink the A3 content to fit onto an A4 layout.