\multicolumn

\multicolumn{cols}{pos}{text}

The \multicolumn is used to make an entry that spans several columns. The first mandatory argument, cols, specifies the number of columns to span. The second mandatory argument, pos, specifies the formatting of the entry; c for centered, l for flushleft, r for flushright. The third mandatory argument, text, specifies what text is to make up the entry.

See also: Environments, tabular,