Some mathematical formulas and symbol fonts are not supported when using the built-in PDF reader.

ggdz0424
When I open the PDF with Adobe, I need to download some fonts starting with "WP.." such as "WP Greek Century" to read it properly. However, when I use the built-in reader of Zotero, it seems that these fonts are not supported, resulting in garbled text. How can I make the built-in reader support these fonts as well?
  • mjthoraval
    Can you provide an example of a PDF file where you see the problem?
  • ggdz0424



    related pdf has been attached in the email
  • martynas_b
    Yes, the problem is that the PDF file doesn’t include the necessary fonts. One possible solution would be to install those fonts system-wide or find a way to re-export the file from Acrobat Reader with the fonts included.
  • mjthoraval
    After installing the fonts, the PDF file can be read properly from Adobe Acrobat. But still not in Zotero. It works to export the file with embed fonts and then add to Zotero.

    But the problem is that the Zotero PDF Reader does not show any warning about missing fonts. Could it also send the warning like Adobe Acrobat?

    And could Zotero use the system fonts to read the PDF file like Adobe Acrobat, even without embedding the fonts in the PDF file?
  • martynas_b
    @mjthoraval

    PDF.js should already be able to use system fonts.

    Yes, we can consider showing a visible warning message. In fact, PDF.js already does that, but it currently shows the message in the console log.
  • mjthoraval
    PDF.js should already be able to use system fonts.
    It does not seem to work for me.

    Here is what I see when I open the file in Adobe Acrobat:



    And what I see for the same file in Zotero:



    I have also tried restarting the computer after installing the fonts, but still no difference.
  • martynas_b
    Are the fonts actually installed on your system, or did you just download them for internal use in Acrobat Reader?
  • mjthoraval
    I have installed the missing fonts on the system (Windows 10).
    The PDF displays properly in Acrobat Reader, Foxit PDF Reader and PDF-XChange Editor.
    But it fails with PDF.js and with Okular.
  • martynas_b
    Thanks for letting us know. We’ll investigate.
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