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In a document of mine, I was using the following symbol and command:

\newcommand{\plus}{{\textcircled{+}}}

At first, the symbol \textcircled{+} looked normal and smooth like the rest of the math. Now I recompiled the .tex file and the symbol looks fuzzy (see the pic below). I get the same in another document and both in the internal PDF viewer and in like Adobe Acrobat Reader. I did not change packages or preferences, so I have no idea about what is causing this.

Any suggestions on how to get smoothness back?

enter image description here

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    Which compile command do you use? You can find clue in the first line of .log file. – muzimuzhi Z Jul 27 at 10:26
  • I am using PdfLatex but I was using that even before.Nothing suspicious in the log file – user221278 Jul 27 at 10:33
  • Also, the command might now work well in math mode. However, even \newcommand{\p}{\text{{\footnotesize \textcircled{+}}}} is fuzzy – user221278 Jul 27 at 10:39
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    Show the end of the log file where the fonts are listed (pfb and pk files) – Ulrike Fischer Jul 27 at 11:28
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    You're using miktex, it is known to use a pixelated font as default. Either install cm-super (which is scalable and is the default in texlive) or use the lmodern package. And next time please provide a full but minimal example thus that we can see 2hich class and packages you are using – daleif Jul 27 at 15:15
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From the log sniplet you posted we can see that you're using MikTeX. To keep sizes down, sadly, MikTeX use a metafont font as the default font. This font is not scalable, and thus at high resolution you see pixelations like you show here

You have two choices

  • install the cm-super package, this installs a vector version of the default font. It is also the default font in texlive
  • use the lmodern package. This font is similar to the standard CM font, but is a vector font. Though it might not have support for Russian

Additionally, next time please provide a full full but minimal example which others can copy and test for them self. Here we do not know which packages or class you're using.

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