This is an example picture. I want to make my table like that.
Here what I am doing.
\documentclass{svjour3} \usepackage{tabularx} \captionsetup{labelfont=bf, justification=raggedleft, singlelinecheck=false, position=above} \begin{document} \begin{table}[ht] \caption{Definitions of symbols} \label{Symbols} % Give a unique label \begin{tabular}{ll} \hline\noalign{\smallskip} {Symbol} & {Definition} \\ \noalign{\smallskip}\hline\noalign{\smallskip} {$\mathcal{G}$} & Graph \\ {$\mathcal{M}$} & Adjacency matrix \\ {$N$} & Vertices \\ {$E$} & Edges \\ \noalign{\smallskip}\hline \end{tabular} \end{table} \end{document} 


\documentclass{...}and ending with\end{document}.