title: How do I add PostGIS to PostgreSQL pgAdmin?
body: <p>I've got PostgreSQL and pgAdmin installed, but I want to add a PostGIS server so I could work on a Geographic Informations System project. </p>
  
  <p>I'm following <a href="http://workshops.boundlessgeo.com/postgis-intro/creating_db.html" rel="noreferrer">this tutorial</a>, which assumes PostGIS is set up. In the previous page of the tutorial, it instructs you to download their software package which includes PostgreSQL and pgAdmin. I already have those installed, so I would like to just add <code>PostGIS</code> but I don't see any way to do so.</p>
  
  <p>Any ideas?</p>
  
  <p><img src="https://i.stack.imgur.com/zJcS7.jpg" alt="pgAdmin screenshot"></p>