timestep.html
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	<H3>timestep command
	</H3>
	<P><B>Syntax:</B>
	</P>
	<PRE>timestep dt
	</PRE>
	<UL><LI>dt = timestep size (time units)
	</UL>
	<P><B>Examples:</B>
	</P>
	<PRE>timestep 2.0
	timestep 0.003
	</PRE>
	<P><B>Description:</B>
	</P>
	<P>Set the timestep size for subsequent molecular dynamics simulations.
	See the <A HREF = "units.html">units</A> command for a discussion of time units.
	The default value for the timestep size also depends on the choice of
	units for the simulation; see the default values below.
	</P>
	<P>When the <A HREF = "run_style.html">run style</A> is <I>respa</I>, dt is the timestep for
	the outer loop (largest) timestep.
	</P>
	<P><B>Restrictions:</B> none
	</P>
	<P><B>Related commands:</B>
	</P>
	<P><A HREF = "fix_dt_reset.html">fix dt/reset</A>, <A HREF = "run.html">run</A>,
	<A HREF = "run_style.html">run_style</A> respa, <A HREF = "units.html">units</A>
	</P>
	<P><B>Default:</B>
	</P>
	timestep = 0.005 tau for units = lj<BR>
	timestep = 1.0 fmsec for units = real<BR>
	timestep = 0.001 psec for units = metal<BR>
	timestep = 1.0e-8 sec (10 nsec) for units = si or cgs<BR>
	timestep = 0.001 fmsec for units = electron<BR>
	timestep = 2.0 usec for units = micro<BR>
	timestep = 0.00045 nsec for units = nano <BR>

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