Schematical scetch of an active margin in Macedonian.
original by  <a href="https://en.wikipedia.org/wiki/User:Chris-martin" class="extiw" title="en:User:Chris-martin">Booyabazooka</a><br>derivative by <a href="//commons.wikimedia.org/wiki/User:Bjankuloski06" title="User:Bjankuloski06">B. Jankuloski</a>
<a href="//commons.wikimedia.org/wiki/File:Active_Margin.svg" title="File:Active Margin.svg">File:Active Margin.svg</a>