%%
%% The LaTeX Companion, 3ed
%%
%% Example 8-4-26 on page I-629 in "Turning the boxes into floats".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{159.0pt}
% small headings for the example
\makeatletter
\renewcommand\section{\@startsection{section}{1}{\z@}%
                          {-1.25ex \@plus-1ex \@minus-.2ex}%
                          {.5ex}%
                          {\normalfont\normalfont\bfseries}}
\makeatother

  \setlength\textfloatsep{.3\textfloatsep}

  \setcounter{section}{6}

  \setlength\textheight{13.4\baselineskip}

%StartShownPreambleCommands
\usepackage{tcolorbox}
\tcbset{every float=\centering, % center floats
        floatplacement=tp}      % default top and page
\newtcbox[auto counter,list inside=logos]
         \tcbfig[2][]{float,size=small,list text=#2,
                      title=\thetcbcounter: #2,#1}
%StopShownPreambleCommands

\begin{document}
\tcblistof[\section*]{logos}{List of Logos}
\section{The \LaTeX\ logo}
A while back \LaTeX{} moved away from a lion
to a hummingbird designed by Paulo Cereda.

\tcbfig[float=!b]{A new logo}
       {\includegraphics[width=.4\textwidth]
                        {latex-logo.pdf}}
\end{document}