LaTeX symbol now looks fuzzy

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?

• 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
• Show the end of the log file where the fonts are listed (pfb and pk files) – Ulrike Fischer Jul 27 at 11:28
• 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