% Example and test for the substitutefont package:
\documentclass{article}
\usepackage{parskip}
\usepackage[LGR,T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[colorlinks=true,linkcolor=blue,urlcolor=blue]{hyperref}
\usepackage{bookmark}
\pagestyle{empty}

\usepackage{substitutefont}

% Serif
\usepackage[scaled=0.97]{newtxtext}
\substitutefont{LGR}{\rmdefault}{artemisia}

% Sans
\substitutefont{LGR}{\sfdefault}{neohellenic}

% Monospaced
\substitutefont{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{http://www.ctan.org/pkg/newtx}{newtx} package and 
\href{http://www.ctan.org/pkg/gfsartemisia}{GFS Artemisia},
\href{http://www.ctan.org/pkg/gfsneohellenic}{GFS Neohellenic},
and \href{http://www.ctan.org/pkg/cbgreek-complete}{CB-Fonts}, 
for Greek text.\footnote{%
See the \href{http://www.ctan.org/pkg/txfontsb}{txfontsb}
package for an alternative.}

\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}
  
\end{description}

\end{document}