Add/remove/modify time information in frames.

time {time0 <initial time> dt <step> [update] | remove}

time0 <initial time> Time of the first frame (ps).
dt <step> Time step between frames (ps).
[update] If specified, modify any existing time info.
remove Remove any time info from frame.

Either add time information to frames, modify existing time information in frames, or remove existing time information from frames. Note that currently COORDS data sets do not store time information, so using this command with the crdaction command will have no effect.