I want a table where the cells contain either a single line of text or two lines of text, and the cell contents are both horizontally and vertically centered.
The height of the cells should be 2cms and length 3cms (assuming the text does not overflows), and some of the cell boundaries should be bold.
One example is as follows:
Any help to create such a table in latex would be much appreciated. Thank You.
Here are two ways, depending on whether you have fixed width cells or not:
r, l or c), you can use the makecell command,m{some length} column typeA demo of both:
\documentclass[12pt]{article} \usepackage[utf8]{inputenc} \usepackage{fourier} \usepackage{array} \usepackage{makecell} \renewcommand\theadalign{cb} \renewcommand\theadfont{\bfseries} \renewcommand\theadgape{\Gape[4pt]} \renewcommand\cellgape{\Gape[4pt]} \begin{document} \sffamily \begin{tabular}{ | c | c !{\vrule width2.5pt}} \hline \makecell{multi-lined \\ contents} & single line \\ \Xhline{2.5pt} \end{tabular} % \qquad % \setlength{\extrarowheight}{3pt} \begin{tabular}{|>{\centering}m{20mm}|>{\centering\arraybackslash}m{20mm} !{\vrule width2.5pt}} \hline multi-lined \newline contents & single line \\ \Xhline{2.5pt} \end{tabular} \end{document} 
\renewcommand\cellgape{\Gape[10pt]}, both the lines move far apart, can this be reduced? And in the second option, if I increase the height by \setlength{\extrarowheight}{20pt} the lines are placed towards the bottom of the cell instead of the center. \cellgape adds this amount of vertical space at the top and bottom of cells, so this is the normal behaviour . Another solution, valid for both methods, use the cellspace package which ensures a minimal vertical spacing at top and bottom of cells in columns with specifier prefixed with the letter S (or C if you also load siunitx). For instance, here, you might use as tables preambles {|Sc|Sc!{\vrule width 2.5pt} and {|>{\centering}S{m{20mm}}|>{\centering\arraybackslash}S{m{20mm} }!{\vrule width2.5pt}} respectively.
\mboxwould help with this question