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Enlarging PDF thumbnails

Nathan Salt -


Increase thumbnail width


  • On-Premise Server + WebMail Installations: Version 6.0 > Current Version
  • Webmail Only Installations: Version 6.0 > Current Version


PDF Render is too small


Atmail renders PDF attachments inline as a PNG image. By default the thumbnail width is 300 pixels, showing a quick snapshot of the content of the PDF.

Should you wish to expand the width of the inline PDF previews edit


Locate the following in function _createPdfPreview:

-thumbnail x300

And replace with:

-thumbnail x700

Save the file, and reload Atmail. All PDF thumbnails will be scaled to 700 pixels, providing a far larger preview of the PDF content.

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