Btukfyl

for sure nothing that not has been answered already but i can't find it.

How to get roman and sansserif fonts in one document?

I need the LATEX Roman while my document is sans serif.

documentclass[11pt]{article}

usepackage{fontspec}

setromanfont{Times-Roman}

setmonofont{FiraMono-Regular.otf}

setmainfont{FiraSans}[

    Ligatures=TeX,

    Path = /Users/novski/Library/Fonts/,

    BoldFont = *-Regular,

    BoldItalicFont = *-Italic,

    ItalicFont = *-Italic,

    UprightFont = *-UltraLight,

]

begin{document}

thispagestyle{empty}

 begin{center}

    vspace*{fill}

    noindentrule{textwidth}{1pt} \ [4mm]

    Large{textsc{this Document is Typset with}} \ [3mm]

    textrm{ Huge{LaTeX{}} }\ [1mm]

    noindentrule{textwidth}{1pt}\

    vspace*{fill}

 end{center}

end{document}

Okay, so let's start with a few problems in your code:

• You set setromanfont and setmainfont where the former is an outdated synonym for the latter. So basically Fira Sans overwrites Times Roman.


• You use size commands like Huge as if they were commands with arguments. Either use them properly in groups ({Huge Test}) or use DeclareTextFontCommand{textHuge}{Huge} and then textHuge{Text}.


• Should you ever have more than one line in one of these lines with changed font size consider adding a paragraph break, so that the inter-line-spacing adjusts.

Regarding your problem: You decided to typeset your document in sans serif font. That's fine, but as you use it as main font you might want to disregard the command names and simply use your roman font family as "sans font" as you swapped meanings either way.

Then you are able to use textsf or sffamily on your example and it will work. Btw: LaTeX might not look good in fonts other than Computer/Latin Modern because of kerning issues, so if you really want to emphasize the "Typeset with LaTeX" aspect you might want to adjust the kerning to your font.

For illustration purposes, I have used the Fira fonts included in TeX Live (removed your paths) and Libertinus Serif which is also part of TeX Live.

documentclass[11pt]{article}

usepackage{fontspec}

setmainfont{Fira Sans}

setsansfont{Libertinus Serif}

setmonofont{Fira Mono}

begin{document}

thispagestyle{empty}

 begin{center}

    vspace*{fill}

    noindentrule{textwidth}{1pt}par

    vspace*{2mm}

    {Largetextsc{This Document is typeset with}par}

    {HugesffamilyLaTeXpar}

    vspace*{2mm}

    noindentrule{textwidth}{1pt}par

    vspace*{fill}

 end{center}

end{document}

One thing you could do is to load your serif font as a named font family, say libertine, which most font packages support, then set your sans serif font as your main font (In many packages, this is the [sfdefault] package option).

You can then declare the new commands

newcommandseriffamily{libertine}

DeclareTextFontCommandtextserif{seriffamily}

Thus allows you to write seriffamily in place of rmfamily and textserif{...} in place of textrm{...}.

I'm a bit late to the party, but if you just want to make sure the LaTeX command expands correctly without kerning adjustments (which you can do with the metafont package), you can force the command to use the Computer Modern font family.

To achieve this, you redefine the command from where you want to apply it:

letmyLaTeXLaTeX

defLaTeX{fontfamily{cmr}rmfamilyselectfontmyLaTeX}

You can as easily revert this back to normal by doing:

letLaTeXmyLaTeX

after the LaTeX you need to typeset occurs.

so the following:

    % .... %

    vspace*{2mm}

    letmyLaTeXLaTeX % <- Copy LaTeX here

    defLaTeX{fontfamily{cmr}rmfamilyselectfontmyLaTeX} % <- Redefine here

    {Largemdseriestextsc{The logo with Computer Modern:}par}

    {HugeLaTeXpar}

    letLaTeXmyLaTeX % <- Revert changes

    {Largemdseriestextsc{The logo with default font:}par}

    {HugeLaTeXpar}

    vspace*{2mm}

    % .... %

Will produce something like this:

Explanation

1. The letmyLaTeXLaTeX command will copy LaTeX into myLaTeX, we do this to avoid overwriting the command LaTeX in the next step. Think of it as "let this be the same as that"
   


2. 
   defLaTeX{...} redefines the LaTeX command sequence with whatever is entered inside the brackets {...} (know as a group).


3. 
   {fontfamily{cmr}rmfamilyselectfontmyLaTeX} sets the font cmr on what follows, in our case, the previously let (or copied) command sequence myLaTeX. Note: I've specifically set rmfamily here to avoid warnings of undefined shapes in some fonts.

This can also be done with some of TeX and friends in the same way.

For the entire document

If you want to use this for every macro, you can put the definition in the preamble of your main *.tex file, as in the MWE below:

documentclass[11pt]{article}

usepackage[light, default]{sourcesanspro} % <- Using this sans serif

usepackage[T1]{fontenc}

letmyLaTeXLaTeX

defLaTeX{fontfamily{cmr}rmfamilyselectfontmy@LaTeX}

begin{document}

    thispagestyle{empty}

    begin{center}

        vspace*{fill}

        noindentrule{textwidth}{1pt}par

        vspace*{2mm}

        {Largemdseriestextsc{This Document is typeset with}par}

        {HugeLaTeXpar}

        vspace*{2mm}

        noindentrule{textwidth}{1pt}par

        vspace*{fill}

    end{center}

end{document}

I generally recommend doing this over making inline changes to fonts. And since LaTeX traditionally is typeset with roman font, I think it should be eaten as intended. Even so, I've added a few options further down.

Result

To illustrate how this works, I use the Source Sans Pro font family as the document font (like I did in the example above). This font does not expand LaTeX well (in my opinion), as shown below:

And here is how it will look once you force the font for LaTeX:

Other options

If you want to use the same font type for consistency, you can use a font that LaTeX expands well with:

For Typewriter fonts, try pcr (Courier), which looks like this:

For Sans Serif fonts, try phv (Helvet), which looks like this:

For Serif fonts, you can also try ppl (Palatino), which looks like this:

Further reading

1. How to typeset every TeX related logo


2. The difference between local and global scope


3. Changing the font of specific words or paragraphs (LaTeX), (XeLaTeX & LuaTeX)