</code></p>


<h4>Description</h4>

<p>This option substitutes all atoms of species &#60;sp1&#62; by atoms of species &#60;sp2&#62;.</p>

<p>The &#60;sp1&#62; and &#60;sp2&#62; can be entered as atomic number or species names.</p>

<p>If a selection was defined (with the <a href="./option_select.html">option <code>-select</code></a>) then only selected atoms are substituted.</p>


<h4>Default</h4>

<p>By default no atom is substituted.</p>



<h4>Examples</h4>

<ul>
<li><code class="command">atomsk sto.cfg 