How to Combine Multiple PDFs into One A0-Size Document in Acrobat
Question details
The user needs to merge multiple PDF files and set the combined document's page size to A0 for large-format printing purposes.

- Product
- Adobe Acrobat
- Device & OS
- not provided
- Scenario
- Arranging and merging multiple PDF files to prepare them for large-format (A0) poster or architectural printing.
- Observed behavior
- Multiple individual PDF files must be consolidated and their final canvas dimension resized into a single A0 document.
Ensure you have all the necessary PDF files saved in one accessible folder and verify the exact A0 dimensions (841 x 1189 mm or 33.1 x 46.8 inches) required by your large-format printer.
Merge Files and Resize via Print to PDF
Combine your separate PDF files first, then adjust the overall page size to A0 using Acrobat's Print to PDF virtual printer.
Acrobat processes this task in two stages: first binding the files together, and then scaling the new unified document onto an A0-sized canvas to prepare it for large-format printers.
Open Adobe Acrobat, go to the 'Tools' menu, and select 'Combine Files'. Click 'Add Files', choose the PDFs you want to merge, drag them to arrange the correct order, and click the 'Combine' button.
With your newly combined PDF open, go to 'File' > 'Print' (or press Ctrl+P). In the Printer dropdown menu, select 'Adobe PDF'.
Click the 'Properties' button next to the printer name. Navigate to the 'Adobe PDF Settings' tab, and click 'Add' next to the Adobe PDF Page Size field. Create a custom page size named 'A0 Size' and set the dimensions to 841 x 1189 millimeters (or 33.1 x 46.8 inches). Click 'Add/Modify' to save it, then select this new size.
Back in the main Print dialog, look under 'Page Sizing & Handling' and select 'Fit' to ensure your original content scales correctly to fill the A0 canvas. Click 'Print' and choose a destination to save your finalized A0-sized PDF document.

Combine and Resize PDFs Easily with WPS Office
WPS Office provides a comprehensive and user-friendly PDF toolkit that allows you to easily merge multiple PDF files and customize page sizes for large-format printing without requiring expensive specialized software.
- 1. Open the PDF Merge Tool: Launch WPS Office, navigate to the 'PDF' tab on the home screen, and click on 'Merge PDF' from the top toolbar.
- 2. Add and Arrange Your Files: Click 'Add Files' to select the PDFs you wish to combine. You can drag and drop the imported files to arrange them in your preferred printing sequence.
- 3. Merge and Resize: Click 'Merge' to create the unified document. To set it to A0, go to 'Menu' > 'Print', select a virtual PDF printer, and set the custom paper size to A0 dimensions (841 x 1189 mm) using the 'Fit for printing margin' option.

Frequently Asked Questions
What are the exact dimensions of an A0 PDF page?
An A0 page size is standard at 841 x 1189 millimeters, which translates to approximately 33.1 x 46.8 inches. When setting custom dimensions in your PDF editor, ensure your measurement units are set correctly to match these values.
Will combining PDFs change the original formatting of my files?
No, combining PDFs essentially binds the existing pages together in the exact order you specify without altering the text or layout. However, if you subsequently resize the merged document to A0, the visual content will be scaled up, which may change how the layout appears on the much larger canvas.
Can I rearrange the order of the PDFs after I've combined them?
Yes. Once the files are combined, you can use the 'Organize Pages' tool in Adobe Acrobat or WPS PDF to visually drag and drop individual pages into a new order before you save or print the final A0 document.
Why do my images look blurry after resizing the merged PDF to A0?
If your original PDFs contained low-resolution images (such as standard web graphics at 72 DPI), stretching them mathematically to fit a massive A0 canvas will cause severe pixelation. For large-format printing, always start with high-resolution vector graphics or images of at least 300 DPI.




