\bigskip For example, if the times from the database are 0.0, 0.5, 1.0, 1.5, etc.\null, the commands \cenlinesbegin \cmd{TMIN 0.0} \\ \cmd{TMAX 5.0} \\ \cmd{NINTV 5} \cenlinesend select times 1.0, 2.0, 3.0, 4.0, and 5.0. If the \cmd{NINTV} command is replaced by \cenlinesbegin \cmd{ZINTV 3} \cenlinesend then times 0.0, 2.5, and 5.0 are selected. If the \cmd{NINTV} command is replaced by \cenlinesbegin \cmd{DELTIME 2.0} \cenlinesend then times 0.0, 2.0, 4.0 are selected.