# Horizontal alignment with colorbox

I am getting quite frustrated trying to center a three-part table

\documentclass{article}
\usepackage[flushleft]{threeparttable}
\usepackage{booktabs,xcolor,siunitx}
\definecolor{lightgray}{gray}{0.9}
\begin{document}

\begin{table}[!ht]
\caption[Table]{Text\tnote{a}.}\label{table1}
\begin{threeparttable}
\begingroup\setlength{\fboxsep}{0pt}
\begin{tabular}{l l l}
\hline \hline
\vspace{-0,2cm}&&\\
\textbf{1st Column} & \textbf{2nd Column} & \textbf{3rd Column} \\ \midrule
test\tnote{\textdagger}   &                     &                      \\
\bottomrule
\end{tabular}
\begin{tablenotes}
\item[\textdagger] test
\end{tablenotes}
\end{threeparttable}
\end{table}

\end{document}


I tried several times putting it in a center-environment, tried out several times with \centering, but nothing worked. Apparently, the problem is with

\begingroup\setlength{\fboxsep}{0pt}


Has anyone a solution? I would greatly appreciate any help.

The table looks like:

• If you want your table to be horizontally centered why do you use threeparttable's option flushleft? – leandriis Mar 17 '18 at 10:59
• I must have overlooked the flushleft option, thanks! If I then put the center environment before the threepart table, it works! However, the table notes are then out of place... – elio rico Mar 17 '18 at 11:38
• Welcome to TeX SX! Your use of the flushleft option was correct: it is the tables notes only which are flushleft. It seems there is an incompatibility of this option with the use of \colorbox – Bernard Mar 17 '18 at 12:37
• Dear Bernard, thanks for your comment, as well as your solution posted below which works perfectly, I thank you a lot!! – elio rico Mar 18 '18 at 13:28

Here is a work-around:

\documentclass{article}
\usepackage[showframe]{geometry}
\usepackage[flushleft]{threeparttablex}%
\usepackage{booktabs,longtable, caption, cellspace, hhline}
\usepackage{siunitx}
\usepackage[table]{xcolor}
\definecolor{lightgray}{gray}{0.9}

\begin{document}

\begin{table}[!ht]
\centering\captionsetup{skip = 4pt}
\setlength{\aboverulesep}{0pt}
\setlength{\belowrulesep}{0pt}
\setlength{\cellspacetoplimit}{5pt}
\setlength{\cellspacebottomlimit}{5pt}
\begin{threeparttable}
\caption[Table]{Text\tnote{a}.}\label{table1}
\rowcolors{1}{lightgray}{lightgray}
\begin{tabular}{Cl l l}
\toprule\arrayrulecolor{lightgray}\midrule[0.5ex]\arrayrulecolor{black} \midrule
\textbf{1st Column} & \textbf{2nd Column} & \textbf{3rd Column} \\ \midrule
test\tnote{\textdagger} & & \\
\bottomrule
\end{tabular}
\begin{tablenotes}
\item[\textdagger] test
\end{tablenotes}
\end{threeparttable}
\end{table}

\end{document}


This is a work-around; put the colorbox inside an extra tabular.

\documentclass{article}
\usepackage[flushleft]{threeparttable}
\usepackage{booktabs,xcolor,siunitx}
\definecolor{lightgray}{gray}{0.9}
\begin{document}

\begin{table}[!ht]\centering
\caption[Table]{Text\tnote{a}.}\label{table1}
\begin{threeparttable}\begin{tabular}{@{}c@{}}%
\begingroup\setlength{\fboxsep}{0pt}%    <-----
\begin{tabular}{l l l}
\hline \hline
\vspace{-0,2cm}&&\\
\textbf{1st Column} & \textbf{2nd Column} & \textbf{3rd Column} \\ \midrule
test\tnote{\textdagger}   &                     &                      \\
\bottomrule
\end{tabular}%
\end{tabular}                       %    <-----
\begin{tablenotes}
\item[\textdagger] test
\end{tablenotes}
\end{threeparttable}
\end{table}

\end{document}


• Thanks a lot for your contribution, your solution actually works perfectly fine !! Really appreciate your help – elio rico Mar 18 '18 at 13:29

Here is another work-around using a parbox to enclose the tablenotes environment.

\documentclass{article}
\usepackage{threeparttable}
\usepackage{booktabs,xcolor,siunitx}
\definecolor{lightgray}{gray}{0.9}
\begin{document}

\begin{table}[!ht]
\centering
\caption[Table]{Text\tnote{a}.}\label{table1}
\begin{threeparttable}
\begingroup\setlength{\fboxsep}{0pt}
\begin{tabular}{l l l}
\hline \hline
\vspace{-0,2cm}&&\\
\textbf{1st Column} & \textbf{2nd Column} & \textbf{3rd Column} \\ \midrule
test\tnote{\textdagger}   &                     &                      \\
\bottomrule
\end{tabular}