I have the following table and I am trying to give a specific length for column 1, 2 and 3 which stays fixed. I found a trick by adding an "invisible" row at the bottom (& \multicolumn{1}{p{3.5cm}}{} & \multicolumn{1}{p{3.5cm}}{}\) but it doesn't seem a nice solution since I get obviously an empty row before my explanation of the table. Without that invisible row, although I put the sizes at the beginning of the table (\begin{tabular}{m{8.2cm} m{3.5} m{3.5cm}}), the table just adapt to the content and it is not what I want.
Do you have any solution? It is the first time I do some table like that in Latex therefore I think the code is highly "inefficient and weird".
Thank you!
\documentclass[11pt,a4paper]{article}
\renewcommand{\baselinestretch}{1.5}
\renewcommand\thesection{\arabic{section}}
\renewcommand\thesubsection{\thesection.\arabic{subsection}}
\usepackage{float}
\usepackage{array}
\usepackage{multirow}
\usepackage{arydshln}
\usepackage{geometry}
\usepackage[font=small, justification=justified, format=plain]{caption}
\begin{document}
\begin{table}[H]
\centering
\caption{Title of the table}
\label{my_label}
\begin{tabular}{m{8.2cm} m{3.5} m{3.5cm}}
\hline
\multirow{2}{*}{Bulletpoint Title} & \multicolumn{2}{c}{Merged columns 2-3}
\\
& \multicolumn{1}{c}{column 2} & \multicolumn{1}{c}{column 3} \\
\hline
\begin{itemize}
\item Bulletpoint 1
\item Bulletpoint 2
\end{itemize}
& \multicolumn{1}{c}{abc} & \multicolumn{1}{c}{abc}\\
\hdashline
\begin{itemize}
\item Bulletpoint 3
\item Bulletpoint 4
\end{itemize}
& \multicolumn{1}{c}{xyz} & \multicolumn{1}{c}{xyz} \\
\hline
Total & \multicolumn{1}{c}{Total c1} & \multicolumn{1}{c}{Total c2}\\
\hline
& \multicolumn{1}{p{3.5cm}}{} & \multicolumn{1}{p{3.5cm}}{}\\
\end{tabular}
\caption*{\footnotesize This table shows *COMMENT*}
\end{table}
\end{document}


m{3.5} m{3.5cm}. Without testing I think changing tom{3.5cm} m{3.5cm}may solve the problem. – Apr 09 '19 at 06:23