Why is there an extra vertical space in Example 2

Question

In the following MWE, why is there an extra vertical space in Example 2 ?

\documentclass{article}
\usepackage[most]{tcolorbox}
\usepackage{showframe}
\usepackage{harmony}
\newtcolorbox{myFrame}
{colback = red, colframe = white, top = 0mm, bottom = 0mm, boxrule = 0pt, left = 2mm, right = 2mm}
\newcommand{\easy}{%
    \llap{\parbox[t][0pt]{1.7cm}{%
            \Acht{}test\
            \small{}easy
    }}%
}
\newcommand{\easyBis}{%
    \llap{\parbox[t][0pt]{1.7cm}{%
            test\
            \small{}easy
    }}%
}
\begin{document}
\begin{myFrame}
    \easy
    Example 1\par
    This is the text of the exercise.\par
    By the way, I use tcolorbox to make my boxes.
\end{myFrame}


\begin{myFrame}
    \easyBis
    Example 2\par
    This is the text of the exercise.\par
    By the way, I use tcolorbox to make my boxes.
\end{myFrame}


\end{document}

score 2 · Accepted Answer · answered Mar 14 '21 at 12:18

Don't use primitive tex boxes in vertical mode, they rarely do what you expect.

\documentclass{article}
\usepackage[most]{tcolorbox}
\usepackage{showframe}
\usepackage{harmony}
\newtcolorbox{myFrame}
{colback = red, colframe = white, top = 0mm, bottom = 0mm, boxrule = 0pt, left = 2mm, right = 2mm}
\newcommand{\easy}{%
    \leavevmode\llap{\parbox[t][0pt]{1.7cm}{%
            \leavevmode\Acht{}test\
            \small{}easy
    }}%
}
\newcommand{\easyBis}{%
    \leavevmode\llap{\parbox[t][0pt]{1.7cm}{%
            test\
            \small{}easy
    }}%
}
\begin{document}
\begin{myFrame}
    \easy
    Example 1\par
    This is the text of the exercise.\par
    By the way, I use tcolorbox to make my boxes.
\end{myFrame}


\begin{myFrame}
    \easyBis
    Example 2\par
    This is the text of the exercise.\par
    By the way, I use tcolorbox to make my boxes.
\end{myFrame}


\end{document}

or better, also hiding the height of note to get the same space above Example

\documentclass{article}
\usepackage[most]{tcolorbox}
\usepackage{showframe}
\usepackage{harmony}
\newtcolorbox{myFrame}
{colback = red, colframe = white, top = 0mm, bottom = 0mm, boxrule = 0pt, left = 2mm, right = 2mm}
\newcommand{\easy}{%
    \leavevmode\llap{\parbox[t][0pt]{1.7cm}{%
            \leavevmode\strut\smash{\Acht}test\
            \small{}easy
    }}%
}
\newcommand{\easyBis}{%
    \leavevmode\strut\llap{\parbox[t][0pt]{1.7cm}{%
            test\
            \small{}easy
    }}%
}
\begin{document}
\begin{myFrame}
    \easy
    Example 1\par
    This is the text of the exercise.\par
    By the way, I use tcolorbox to make my boxes.
\end{myFrame}


\begin{myFrame}
    \easyBis
    Example 2\par
    This is the text of the exercise.\par
    By the way, I use tcolorbox to make my boxes.
\end{myFrame}


\end{document}

Why is there an extra vertical space in Example 2

1 Answers1