534. LaTeX技巧124：自定义list中的表格

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\begin{list}{}{\settowidth{\labelwidth}{\texttt{-f}\emph{filename}}
\setlength{\leftmargin}{\labelwidth}
\addtolength{\labelwidth}{\labelsep}}
\item[\texttt{-b}] Process pages in reverse order; this can be useful on the
A2 model printers which stack their pages face up and therefore in the
reverse of the order in which they were printed.
\item[\texttt{-c\#}] Print \texttt{\#} copies of each page; a photocopier is
cheaper so this qualifier shouldn't really be needed.
\item[\texttt{-x\#}\textit{unit}] Set the left margin to \texttt{\#} (which
can be both a real number and negative); \textit{unit} is one of:

\begin{tabular}{ll}
bp &big point (1in = 72bp)\\
cc &cicero (1cc = 12dd)\\
cm &centimetre (1in = 2.54cm)\\
dd &didot point (1157dd = 1238pt)\\
in &inch\\
mm &millimetre\\
pc &pica (1pc = 12pt)\\
pt &point (72.27pt = 1in)\\
sp &scaled point (65536sp = 1pt)
\end{tabular}

The default margin is 1in.
\item[\texttt{-y\#}\textit{unit}] Set top margin. The default is 1in.
\end{list}

效果图：

\newlength{\numlen}
\settowidth{\numlen}{xxxx000--000--0000}
\settowidth{\labelsep}{000}

\begin{list}{}{\setlength{\labelwidth}{\numlen}\setlength{\leftmargin}{\numlen}
\addtolength{\leftmargin}{\labelsep}}
\item[0385--41191] (RDC) V21, (use 8-bit no-parity), connected to
Departmental Gandalf PACX.
PACX service is \texttt{STARN}.
More details if you specify \texttt{HELP} instead of \texttt{STARN} after
the Gandalf prompt.
\item[061--273--5730] (RDC) V21/V23 (autobaud), seven bits, even parity,
connected to VAX--11/750.
\item[0477--71324] (RDC) V21/V23/V22/V22bis (autobaud), connected to a DECserver
200.
\item[0235--831--593] (RDC) VAX 11/780, V22.
\item[0235--44--6951] PAD line V21/V23.
\item[0235--44--6952] PAD line V22/V22bis.
\end{list}

效果图：