This document aims to list changes that were made in <code>v.2</code> and how to handle them in your Reading System/apps when upgrading ReadiumCSS.</p>

    <section id="removal-of-responsive-columns" class="level2">
      <h2 id="sigil_toc_id_191">Removal of responsive columns</h2>

      <p>In version 1, ReadiumCSS used media queries to automatically handle the number of columns/pages to display based on certains conditions. To sum things up it switched from 1 to 2 columns when:</p>

      <ul>
        <l