How to set relative canvas size in millimeters? SOLVED

[Jensen Head]

For example, I cropped the outer white margins with "Set to White Margins". Next, I want to have 10mm margins on all sides of the page. In Adobe Photoshop it is done like this:
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2022-01-11_17-32-11.png

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In the "Resize Pages" window, I only see options for "Standard" (predefined page sizes), "Custom" (manually set page sizes), and "Percentage" (page sizes as a percentage of the current page).

[Daniel - PDF-XChange]

Hello, Jensen Head

At the moment we do not offer a relative function, so for now you would need to use the "custom" option, set units to millimeter, and then calculate the +10 increase to the values shown there manually.

With that said, I cannot offer any guarantees or a timeline for it, but I have just created a formal feature request on this topic, that hopefully we can implement in the future.
RT#5910: FR: add option to increase/reduce page size by static value.

Kind regards,

[Jensen Head]

A workaround for increasing pages by a user-specified number of millimeters is to use the "Merge Pages" tool, specifying "Pages per Sheet: Custom 1 by 1" and in the "Margins" fields the required margins on each of the four sides of the pages.

[Stefan - PDF-XChange]

Hello Jensen Head,

Thanks for the suggested workaround!

Kind regards,
Stefan

[Jensen Head]

RT#5910: FR: add option to increase/reduce page size by static value.

PowerToys (2025-12-09 18-28-17)_converted.webp

Thank you!

[Daniel - PDF-XChange]