I cannot preview documents in Lyx. For example:

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Note that export works fine.

Any idea of how I can diagnose what is going on?

I am on Linux Mint.


Recent versions of Linux Mint use a new PDF viewer, called xreader, which Lyx does not automatically recognize.

Go to Tools -> Preferences -> File Handling -> File Formats. In the Format dropdown, select PDF (pdflatex). Then, where it says Viewer, select Custom, and type xreader.

enter image description here


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