Time for action – emphasizing on a sans-serif font

We shall write our complete document using a sans-serif font. As we did not yet see how emphasizing without serifs looks, we will try that:

  1. Take our "Hello world!" example and modify it this way:
    \documentclass{article}
    \renewcommand{\familydefault}{\sfdefault}
    \begin{document}
    \emph{Hello world!}
    \end{document}
  2. Typeset. LaTeX will print out a warning:

    LaTeX Font Warning: Font shape `OT1/cmss/m/it' in size <10> not available

    (Font) Font shape `OT1/cmss/m/sl' tried instead on input line 4.

  3. Check the output:
    Time for action – emphasizing on a sans-serif font

What just happened?

The macro \familydefault stands for the default font family which shall be used ...

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