nstalled on the fly in System Designer.</p>
<blockquote>
<p><strong>What can be done in extension?</strong></p>
<ul>
<li>toolbar item creation,</li>
<li>actions when clicking on them and</li>
<li>dialog creations.</li>
</ul>
</blockquote>
<h2><a class="anchor" aria-hidden="true" id="install-an-extension"></a><a href="#install-an-extension" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="