# The design of tables

In recent years, several authors have argued that the examples, set out by Lamport in his LaTeX manual, have cramped authors’ style and have led to extremely poor table design. It is in fact difficult even to work out what many of the examples in Lamport’s book “mean”.

The criticism focuses on the excessive use of rules (both horizontal and vertical) and on the poor vertical spacing that Lamport’s macros offer.

The problem of vertical spacing is plain for all to see, and is addressed in several packages — see “spacing of lines in tables”.

The argument about rules is presented in the excellent essay that prefaces the documentation of Simon Fear’s booktabs package, which (of course) implements Fear’s scheme for ‘comfortable’ rules. (The same rule commands are implemented in the memoir class.)

Lamport’s LaTeX was also inflexibly wrong in “insisting” that captions should come at the bottom of a table. Since a table may extend over several pages, traditional typography places the caption at the top of a table float. The \caption command will get its position wrong (by 10pt) if you simply write:

\begin{table}
\caption{Example table}
\begin{tabular}{...}
...
\end{tabular}
\end{table}

The topcapt package solves this problem:
\usepackage{topcapt}
...
\begin{table}
\topcaption{Example table}
\begin{tabular}{...}
...
\end{tabular}
\end{table}

The KOMA-script classes provide a similar command \captionabove; they also have a class option tablecaptionabove which arranges that \caption means \captionabove, in table environments. The caption package may be loaded with an option that has the same effect:
\usepackage[tableposition=top]{caption}

or the effect may be established after the package has been loaded:
\usepackage{caption}
\captionsetup[table]{position=above}

(Note that the two “position” options are different: actually, “above” and “top” in these contexts mean the same thing.)

Doing the job yourself is pretty easy: topcapt switches the values of the LaTeX 2e parameters \abovecaptionskip (default value 10pt) and \belowcaptionskip (default value 0pt), so:

\begin{table}
\setlength{\abovecaptionskip}{0pt}
\setlength{\belowcaptionskip}{10pt}
\caption{Example table}
\begin{tabular}{...}
...
\end{tabular}
\end{table}

does the job (if the length values are right; the package and classes are more careful!).
booktabs.sty
booktabs
caption.sty
caption
KOMA script bundle
koma-script
memoir.cls
memoir
topcapt.sty
topcapt