Defining mdframe style by reference to another style

Question

I'm wanting to define an mdframe style "studies", by reference to mdframe style "mpdframe". In the example shown, the difference would be to add a frame title, "Studies".

The following code does not produce errors, but neither does it produce the desired effect.

%   Principal MPD frame type
\mdfdefinestyle{mpdframe}{
    frametitlebackgroundcolor   =black!15,
    frametitlerule          =true,
        roundcorner     =10pt,
        middlelinewidth     =1pt,
        innermargin     =0.5cm,
        outermargin     =0.5cm,
        innerleftmargin     =0.5cm,
        innerrightmargin        =0.5cm,
        innertopmargin      =\topskip,
        innerbottommargin   =\topskip,
            }
%   Studies
\mdfdefinestyle{studies}{%
\mdfapptodefinestyle{mpdframe}{frametitle={Studies}}
    }
\newmdenv[style=studies]{studies}

Can this be done another way?

Ideally, I want to define numerous styles in this way, by reference to this base style, rather than continually repeating the option commands.

Answer 1

You can simply use one style when defining another:

\mdfdefinestyle{studies}{%
    style=mpdframe,% <------ previously defined style
    frametitle={Studies},
}

Notes:

• You also need \usepackage[framemethod=tikz]{mdframed} when using tikz within mdframed.

Code:

\documentclass{article}
\usepackage{xcolor}
\usepackage[framemethod=tikz]{mdframed}
\usepackage{lipsum}
%   Principal MPD frame type
\mdfdefinestyle{mpdframe}{
    frametitlebackgroundcolor   =black!15,
    frametitlerule          =true,
        roundcorner     =10pt,
        middlelinewidth     =1pt,
        innermargin     =0.5cm,
        outermargin     =0.5cm,
        innerleftmargin     =0.5cm,
        innerrightmargin        =0.5cm,
        innertopmargin      =\topskip,
        innerbottommargin   =\topskip,
            }
%   Studies
\mdfdefinestyle{studies}{%
        style=mpdframe,
        frametitle={Studies},
    }
\newmdenv[style=studies]{studies}
\begin{document}
\begin{studies}
\lipsum[1]
\end{studies}
\end{document}