How to Scan a Custom Paper Size in Adobe Acrobat Pro DC
Question details
The user needs to scan a document with non-standard dimensions (8.5 by 25 inches) into a PDF using Adobe Acrobat Pro DC and a connected scanner.
- Product
- Adobe Acrobat Pro DC
- Device & OS
- Windows 10
- Scenario
- Scanning a long contract or uniquely sized physical document directly into a PDF format.
- Observed behavior
- The user requires instructions on how to configure custom paper dimensions, as default scanner settings in Acrobat may not automatically list non-standard sizes.
Ensure your scanner is powered on, properly connected to your Windows 10 PC, and that you have installed the most recent scanner drivers from the manufacturer's official website.
Set Custom Paper Size via Acrobat Scanner Settings
Use Acrobat's built-in scanning interface to access your scanner's native driver settings and define custom dimensions.
Acrobat Pro DC relies on your scanner's TWAIN or WIA drivers to control hardware settings. You can access these settings directly within the Acrobat creation menu.
Launch Adobe Acrobat Pro DC, navigate to the 'Tools' tab at the top, and select 'Create PDF'.
Click on 'Scanner' from the left-hand menu, then choose your specific scanner model (e.g., Samsung M2885FW) from the device dropdown list.
Click the gear icon (Settings) located next to the scanner name or click 'Options' to open the scanner driver properties.
Locate the 'Paper Size' or 'Page Size' dropdown. Select 'Custom' or 'User Defined', and enter your specific dimensions (8.5 for width, 25 for height). Save the settings.
Click the 'Scan' button to begin scanning your document with the newly applied custom paper dimensions.
Scan Using Manufacturer Software and Convert to PDF
If Acrobat cannot access custom size settings, use the scanner's official software to scan the document as an image, then convert it to PDF.
Need a simpler way to manage your scanned PDFs?
If configuring scanner drivers in expensive software is causing frustration, WPS Office offers a free, lightweight, and user-friendly PDF editor alongside a complete office suite. Easily view, edit, and manage your scanned documents without the heavy subscription costs.
Frequently Asked Questions
Why is the custom paper size option missing in Acrobat?
The paper size options available in Acrobat are determined by your scanner's TWAIN or WIA drivers. If the manufacturer's driver does not expose custom size settings to third-party applications, the option will not appear in the Acrobat scanning interface.
Can I crop a scanned PDF to a custom size after scanning?
Yes. If your scanner forces you to scan at a larger standard size, you can use the 'Crop Pages' tool in Acrobat (Tools > Edit PDF > Crop Pages) to trim the excess white space and adjust the document down to your desired 8.5x25-inch dimensions.
What if my scanner cannot physically feed a 25-inch long document?
If your scanner hardware does not support long document feeding, you will need to scan the contract in multiple sections. You can then use the 'Organize Pages' or 'Combine Files' tools in a PDF editor to merge the sections into a single document.
