Usage: <tt>annealspec = [ <i>step n0 n1</i> ]  cutpath</tt>

<p>
Select a subset of configurations along the chain <tt>Rc</tt>, with id
<tt><i>n0</i>, <i>n0</i>+<i>step</i>, <i>n0</i>+2*<i>step</i>, &hellip;, 
<i>n1</i></tt>, and make that the new chain.

<p>
Also see <tt>chainlength</tt>.

