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I only know this: when I type a word containing “fi” in a Typewriter comment in Master PDF Editor using the font Noto Sans, I get something that looks like this: Noto Sans does not work in Master PDF Editor on my machine I don’t know whether to blame Master PDF Editor or the font or some strange interaction between the two. I don’t know exactly where the problem lies. It’s important to know this: I don’t know fonts. (I don’t know that it’s a font ligature problem, but it seems like a reasonable explanation.) After a few months of noticing this problem and working around it (by restricting myself to words without “fi” in them!), I finally figured out that this problem lies in the default font that Master PDF Editor uses for such annotations: “Noto Sans”. Ah, yes! I presume that this is a font ligature problem. It took me a few weeks to notice a pattern: it happened whenever I wrote a word that contained the sequence “fi”. Imagine my chagrin recently, when I noticed a font rendering problem when I added a text annotation to a document. It has the typical user experience quirks that one expects from Linux software, but it performs very well and has done everything I’ve needed it to do.
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It seemed to have all the features I needed and I learned fairly quickly how to use it. When I learned about Master PDF Editor, I felt encouraged. Since PDFs lie at the center of my company’s record-keeping system, I needed a solid and quick-to-use alternative. When I switched from Mac OS to Pop!_OS, I worried about how I would replace the venerable PDF Pen. I infer that there is some font ligature rendering problem with the default font Noto Sans in Master PDF Editor. You know that you have this problem if you enter a Typewriter comment that contains the character sequence “fi”. I like “Inter”, but that font just happens to work.
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Under the settings for Text, choose a different font.In the unnamed drop-down box, choose Typewriter.From the menu of option categories, choose Comments.(I see the same disfigured text when I view the document in Zathura.) Changing the default font is not obvious from the Settings UI, so do this: This isn’t just a rendering problem in the viewer, but a font problem in the document itself. If you use Master PDF Editor on Linux, then don’t use Noto Sans as the font for Typewriter comments/annotations, because the font will sometimes render incorrectly.
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