%%
%% The LaTeX Companion, 3ed
%%
%% Example 7-4-4 on page I-544 in "Standard customization possibilities for \protect \nxLcs  {caption}".
%%
%% 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{111.0pt}
%
  \setlength\intextsep{6pt}

%StartShownPreambleCommands
 \usepackage{graphicx,float,caption}
 \floatstyle{boxed} \restylefloat{figure}
 \DeclareCaptionLabelSeparator{colon-newline}{:\newline}
 \captionsetup[figure]{aboveskip=3pt,singlelinecheck=false,
       labelsep=colon-newline,labelfont={small,bf},name=Image}

%StopShownPreambleCommands

\begin{document}
 \begin{table}[ht] \centering
    A B C \caption{No format change}
 \end{table}
 \begin{figure}[ht] \centering
   \includegraphics[width=12mm]{Escher}   \caption{}
 \end{figure}
 \begin{figure}[ht] \centering
   \includegraphics[width=12mm]{elephant}
   \caption{A small elephant}
 \end{figure}
\end{document}