What and how do I set my title to go upwards in tcolorbox?

Question

This is the source on page 182 of the tcolorbox manual. Nice to meet you. Latex newbie. It's an honor to ask you the first question.

I don't know how to modify My title to go upwards:

%------------------------
\newtcolorbox{mybox}[2][]{skin=enhancedlast jigsaw,interior hidden,
boxsep=0pt,top=0pt,colframe=red,coltitle=red!50!black,
fonttitle=\bfseries\sffamily,
attach boxed title to bottom center,
boxed title style={empty,boxrule=0.5mm},
varwidth boxed title=0.5\linewidth,
underlay boxed title={
\draw[white,line width=0.5mm]
([xshift=0.3mm-\tcboxedtitleheight*2,yshift=0.3mm]title.north west)
--([xshift=-0.3mm+\tcboxedtitleheight*2,yshift=0.3mm]title.north east);
\path[draw=red,top color=white,bottom color=red!50!white,line width=0.5mm]
([xshift=0.25mm-\tcboxedtitleheight*2,yshift=0.25mm]title.north west)
cos +(\tcboxedtitleheight,-\tcboxedtitleheight/2)
sin +(\tcboxedtitleheight,-\tcboxedtitleheight/2)
-- ([xshift=0.25mm,yshift=0.25mm]title.south west)
-- ([yshift=0.25mm]title.south east)
cos +(\tcboxedtitleheight,\tcboxedtitleheight/2)
sin +(\tcboxedtitleheight,\tcboxedtitleheight/2); },
title={#2},#1}
\begin{mybox}{My title}
\lipsum[2]
\end{mybox}
%------------------------

Answer 1

Next time, give a compiled document \documentclass --> \end{document}

It was necessary to change

• enhancedlast jigsaw to enhancedlast jigsaw
• north to south
• yshift reversed

The code

\documentclass[border=3mm]{standalone}
\usepackage[most]{tcolorbox}
\usepackage{varwidth}
\usepackage{lipsum}
%------------------------
\newtcolorbox{mybox}[2][]{skin=enhancedlast jigsaw,interior hidden,
boxsep=0pt,top=0pt,colframe=red,coltitle=red!50!black,
fonttitle=\bfseries\sffamily,
attach boxed title to bottom center,
boxed title style={empty,boxrule=0.5mm},
varwidth boxed title=0.5\linewidth,
underlay boxed title={
\draw[white,line width=0.5mm]
([xshift=0.3mm-\tcboxedtitleheight*2,yshift=0.3mm]title.north west)
--([xshift=-0.3mm+\tcboxedtitleheight*2,yshift=0.3mm]title.north east);
\path[draw=red,top color=white,bottom color=red!50!white,line width=0.5mm]
([xshift=0.25mm-\tcboxedtitleheight*2,yshift=0.25mm]title.north west)
cos +(\tcboxedtitleheight,-\tcboxedtitleheight/2)
sin +(\tcboxedtitleheight,-\tcboxedtitleheight/2)
-- ([xshift=0.25mm,yshift=0.25mm]title.south west)
-- ([yshift=0.25mm]title.south east)
cos +(\tcboxedtitleheight,\tcboxedtitleheight/2)
sin +(\tcboxedtitleheight,\tcboxedtitleheight/2); },
title={#2},#1}

\newtcolorbox{mybox2}[2][]{
  skin=enhancedfirst jigsaw,%<--  last -> first
  interior hidden,
  bottom=0pt,
  colframe=red,
  coltitle=red!50!black,
fonttitle=\bfseries\sffamily,
attach boxed title to top center,%<--- bottom -> first
boxed title style={empty,boxrule=0.5mm},
varwidth boxed title=0.5\linewidth,
%%%%%%%%%  south <--> north
%%%%%%%%%  yshift + --> yshift -
underlay boxed title={
  \draw[white,line width=0.5mm]
  ([xshift=0.3mm-\tcboxedtitleheight*2,yshift=-0.3mm]title.south west)
  --([xshift=-0.3mm+\tcboxedtitleheight*2,yshift=-0.3mm]title.south east);
  \path[draw=red,top color=white,bottom color=red!50!white,line width=0.5mm]
  ([xshift=0.25mm-\tcboxedtitleheight*2,yshift=-0.25mm]title.south west)
  cos +(\tcboxedtitleheight,\tcboxedtitleheight/2)
  sin +(\tcboxedtitleheight,\tcboxedtitleheight/2)
  -- ([xshift=0.25mm,yshift=-0.25mm]title.north west)
  -- ([yshift=-0.25mm]title.north east)
  cos +(\tcboxedtitleheight,-\tcboxedtitleheight/2)
  sin +(\tcboxedtitleheight,-\tcboxedtitleheight/2); },
title={#2},#1}
\begin{document}
\begin{mybox}{My title}
  \lipsum[2]
\end{mybox}

\begin{mybox2}{My title}
  \lipsum[2]
\end{mybox2}
%------------------------
\end{document}