% Example and test for the substitutefont package:
\documentclass{article}
\usepackage{parskip}
\usepackage[LGR,T1]{fontenc}
\usepackage[colorlinks=true,linkcolor=blue,urlcolor=blue]{hyperref}
\usepackage{bookmark}
\pagestyle{empty}
% \usepackage{substitutefont} % obsolete
% Serif
\usepackage[scaled=0.97]{newtxtext}
\DeclareFontFamilySubstitution{LGR}{\rmdefault}{txrc}
% Sans
\DeclareFontFamilySubstitution{LGR}{\sfdefault}{neohellenic}
% \DeclareFontFamilySubstitution{LGR}{\sfdefault}{epigrafica}
% Monospaced
\DeclareFontFamilySubstitution{LGR}{\ttdefault}{cmtt} % CB fonts
% Teststring
\newcommand{\alphabet}{%
abcdefghjiklmnoprqrstuvwxyzäöüß
{\fontencoding{LGR}\selectfont abgdezhjiklmnxoprsctufqyw} \\
ABCDEFGHJIKLMNOPRQRSTUVWXYZÄÖÜ
{\fontencoding{LGR}\selectfont ABGDEZHJIKLMNXOPRSTUFQYW}%
}
\begin{document}
\section*{Times/Helvetica/TXTT and Greek replacements}
Use Times, Helvetica, and TXTT (from the
\href{
https://ctan.org/pkg/newtx}{newtx} package) with
\href{
https://ctan.org/pkg/txfontsb}{FreeSerifb},
\href{
https://ctan.org/pkg/gfsneohellenic}{GFS Neohellenic},
and \href{
https://ctan.org/pkg/cbgreek-complete}{CB-Fonts},
for Greek text.
\begin{description}
\item [Normal:] \alphabet
\item [it:] \textit{\alphabet}
\item [sl:] \textsl{\alphabet}
\item [bf:] \textbf{\alphabet}
\item [bf it:] \textbf{\textit\alphabet}
\item [sc:] \textsc{\alphabet}
% \item [bf sc:] \textsc{\textbf\alphabet} missing in Bodoni
\item [sf:] \textsf{\alphabet}
\item [sf bf:] \textsf{\textbf\alphabet}
\item [sf sl:] \textsf{\textsl\alphabet}
\item [sf sc:] \textsf{\textsc\alphabet}
\item [tt:] \texttt{\alphabet}
% \item [tt bf:] \texttt{\textbf\alphabet} % not in CB-Greek
\item [tt it:] \texttt{\textit\alphabet}
\end{description}
\end{document}
