title: Enabling the `todo` feature in sphinx docs
body: <p>I am trying to use <code>todo</code> feature, I found a link on <a href="http://www.sphinx-doc.org/en/stable/ext/todo.html?highlight=todo#directive-todolist" rel="nofollow noreferrer">sphinx-docs</a> and the following syntax </p>
  
  <pre><code>.. todo::
  </code></pre>
  
  <p>but it says that I need to set the <code>todo_include_todos</code> to <code>True</code>, as by default it is <code>False</code>, which file I need to update to get in enabled? </p>
  
  <p>I found another SO post <a href="https://stackoverflow.com/questions/22290548/sphinx-todo-box-not-showing">Sphinx todo box not showing</a> but don't think it mentions the file where I need to set the config.</p>