New in the SumatraPDF [pre-release builds](https://www.sumatrapdfreader.org/prerelease):

## Digital signature info in Document Properties

Document Properties shows the digital signatures in a PDF: who signed it, whether the certificate is trusted and whether the document is unchanged since signing. It also shows the signing time, reason and location. The `sign` command-line tool is also enabled ([#5572](https://github.com/sumatrapdfreader/sumatrapdf/issues/5572)).

![Document Properties showing a PDF's digital signature: signer, signing time, trust and certificate details](https://files.sumatrapdfreader.org/assets/sumatrapdf/changelog/img/document-properties-signatures-274e.png)

## Progress while opening archives

When a comic book archive is being opened, the loading message shows progress as each file inside the archive is extracted.

More: [changes from April 23, 2026](https://www.sumatrapdfreader.org/docs/Changelog-2026-04-23) and the [full changelog](https://www.sumatrapdfreader.org/docs/Changelog).