The question How to create a box with caption and label like a float? explains perfectly what I need except for one thing; they use the custom caption "InfoBox". How can I use the caption "Box" and avoid the error "Command \Box already defined."?
[Tex/LaTex] Create a box with the caption “Box”
boxescaptionsfloats
Related Solutions
The package caption isn't incompatible with KOMA or longtable.
You don't need the package caption because KOMA provides the command captionof
\documentclass{scrartcl}
\begin{document}
\listoffigures
\section{foo}
\begin{center}
\rule{3cm}{3cm}
\captionof{figure}{bla}
\end{center}
\end{document}
I have mentioned it a few times before but IEEE does not directly use your .tex file. It's there to supply the bare minimal so if it looks like an article it's enough. It doesn't have to be following the standards internally.
They will recode your article with their own terrible terrible workflow, rasterize your images and ruin your math after acceptance. I've been using the following for a couple of years without any issues. It uses subcaption and does a superb job even though it has a command clash due to the redefinitions.
\documentclass[final]{ieeetran}
\usepackage{tikz,lipsum}
\usepackage[labelformat=simple]{subcaption}
% Training subcaption package to comply with
% IEEE standards. We can ignore the warning
% generated by caption.sty which is due to
% the redefinition of \@makecaption
\DeclareCaptionLabelSeparator{periodspace}{.\quad}
\captionsetup{font=footnotesize,labelsep=periodspace,singlelinecheck=false}
\captionsetup[sub]{font=footnotesize,singlelinecheck=true}
\renewcommand\thesubfigure{(\alph{subfigure})}
\title{My title}
\author{my author}
\begin{document}
\maketitle
\begin{abstract}
\lipsum*[1]
\end{abstract}
\lipsum[2-5]
\begin{figure}
\begin{subfigure}[b]{.6\linewidth}
\centering%
\begin{tikzpicture}
\draw[help lines] (-1,-1) grid (1,2);
\end{tikzpicture}
\caption{A caption}
\label{fig:a}
\end{subfigure}%
\begin{subfigure}[b]{.4\linewidth}
\centering%
\begin{tikzpicture}
\draw[help lines] (-1,-1) grid (1,2);
\end{tikzpicture}
\caption{B cap}
\label{fig:b}
\end{subfigure}
\caption{Two figures.}\label{fig:1}
\end{figure}
\end{document}
If you only want the caption labels leave the sub \caption{} definitions empty and describe the subfigures in the main caption. If you want to remove also the (a),(b) use \phantomcaption commands as described in the manual.
Best Answer
The answer you mention uses undocumented commands. Better to declare the new float type explicitly.