Zotero built-in PDF viewer could not display texts correctly

I recently added a new book into Zotero and when I tried to view it in built-in viewer, the texts could not be seen. I am sure that they were displayed as I could select and copy the texts, but they could not be seen. That's to say, the text displayed has the same color (white) as the background. What is more strange is some pages could be displayed correctly. These pages each have a graph on it. And the first and last some pages could be displayed correctly.
When I open just this file in macOS Preview and Safari, they are displayed correctly, say, with black texts on white background.
This may be a problem with Firefox as I could not open with newest Firefox on Mac either.
Any solution to this? Thanks very much!

The PDF version is 1.6 if it may help.

  • This seems to be a problem with Mozilla/pdf.js as Zotero uses it. Debug console said it has unrecognized color space which I do not quite understand. Whatever, after I opened it in a PDF editor, made a trivial change and undo it, then saved it, everything now goes on the right way. Zotero and Firefox can display the content correctly.
Sign In or Register to comment.