# tcolorbox with title on the left side

How can I put the title of a box (with tcolorbox) on the left side (text rotated by 90°), like this?

 _______________________________
|   |                           |
| T | Lorem ipsum               |
| I | blah blah                 |
| T |                           |
| L |                           |
| E |                           |
|___|___________________________|


TITLE is rotated by 90°, not like in the ASCII pic. It's just me or this is not specified at all in the manual?

You could use a detached title and add it to an enlarged margin:

\documentclass{article}

\usepackage[most]{tcolorbox}
\usepackage{lipsum}

\tcbset{%
enhanced,
coltitle=black,
detach title,
left=10mm,
overlay={
\node[rotate=90, minimum width=1cm, anchor=south,yshift=-0.8cm] at (frame.west) {\tcbtitle};
}
}

\begin{document}

\begin{tcolorbox}[title=test]
\lipsum[1]
\end{tcolorbox}

\end{document}


Or if you prefer a separation line between the title and the text:

\documentclass{article}

\usepackage[most]{tcolorbox}
\usepackage{lipsum}

\newtcolorbox{mybox}[2][]{
enhanced,
coltitle=black,
title={#2},
sidebyside,
detach title,
attach title to upper={\tcblower},
lefthand width=0.3cm,
#1
}

\makeatletter
\renewcommand\tcbtitle{\ifx\tcbtitletext\@empty\else%
\leavevmode{\rotatebox{90}{\color{tcbcol@title}\kvtcb@fonttitle\kvtcb@haligntitle\kvtcb@before@title\tcbtitletext\kvtcb@after@title}}\fi}
\makeatother

\begin{document}

\begin{mybox}{Title}
\lipsum[2]
\end{mybox}

\end{document}


What I did in the end, following this approach:

\usepackage{lipsum}
\usepackage{xcolor}
\definecolor{lbrown}{HTML}{EB811B}
\usepackage[most]{tcolorbox}
\newtcolorbox{mybox}[2][]{%
enhanced,
boxsep=3pt,
arc=1.25ex,
colback=white,
colframe=lbrown,
boxrule=3pt,
leftrule=18pt,
overlay unbroken and first ={%
\node[rotate=90,
minimum width=1cm,
anchor=south,
font=\Large\sffamily\bfseries,
yshift=-18pt,
white]
at (frame.west) {#2};
}
}
\begin{document}
\begin{mybox}{LOREM IPSUM}
\lipsum[2]
\end{mybox}
\end{document}