
<li><p><code>gcm.approach</code>: Which approach should be used when
      computing the representatives of a cell. The default is <code>"min"</code>,
      i.e. the observation with the best (minimum) value within per cell.</p></li>
<li><p><code>gcm.cf_power</code>: Theoretically, we need to compute the
      canonical form to the power of infinity. However, we use this value
      as approximation of infinity. The default is <code>256</code>.</p></li>
</ul></li>
<li><p>Plot Control:</p><ul>
<li><p><code>