
  <dt class="col-md-4"> iterators:</dt>
    <dd class="col-md-8"> do(), for(), while()</dd>
  <dt class="col-md-4"> image attributes:</dt>
  	<dd class="col-md-8"> s.depth, s.kurtosis, s.maxima, s.mean, s.minima, s.resolution.x, s.resolution.y, s.skewness, s.standard_deviation</dd>
  <dt class="col-md-4"> user settings:</dt>
  	<dd class="col-md-8">define Fx symbols as user settings, e.g. <pre class="p-3 mb-2 text-body-secondary bg-body-tertiary cli"><samp>magick ... -set option:wd1 "%[fx:w/2]" -resize "%[