Is it possible to choose the fonts of title page and contents?

[proafxin]

I would like to use the normal font rather than sffamily for title page and contents. I am personally not a big fan of sffamily fonts. I was wondering if there was a way to keep them to default ones.

[Jinwen-XU]

If you are using XeLaTeX or LuaLaTeX, then it is possible to switch the sans serif font to the (almost) default via

\setsansfont{NewCMSans10}
  [
    Scale          = 1.05 ,
    Extension      = .otf,
    UprightFont    = *-Regular,
    BoldFont       = *-Bold,
    ItalicFont     = *-Oblique,
    BoldItalicFont = *-BoldOblique,
  ]

or

\setsansfont{lmsans10}
  [
    Scale          = 1.05 ,
    Extension      = .otf,
    UprightFont    = *-regular,
    BoldFont       = *-bold,
    ItalicFont     = *-oblique,
    BoldItalicFont = *-boldoblique,
  ]

For pdfLaTeX, the sans serif font is set by the package newpxtext, and I don't know an easy way to undo this.

---

As an end note, the reason that I didn't use the default sans serif font is that it does not provide some combinations like sc+bf, which, if you enable both the options title in boldface and title in scshape, would look not quite satisfactory.

[proafxin]

Thank you. For pdflatex, I was able to circumvent it to some extent like this:

\documentclass{book}
\usepackage{colorist}
\TitlePage [ color = { main = forestgreen!75!black, back = forestgreen!10!yellow!30 } ]
    {
        , title     = \normalfont\textsc{Title}
        , subtitle  = 
        , author    = \normalfont{Masum Billal}
        , date      = {}
    }

Update: I was able to circumvent the issue entirely by having colorist.sty and colorist-fancy.sty in root project directory and commenting out all the instances of \sffamily and newpxtext. Hopefully this helps if anyone else wants to do the same.

Also, thanks for sharing your package. It's really useful.