title: Emacs, How can I display only current task and hide others in org-mode?
body: <p>Org-mode.<br>
  I have a big tasks tree and I want to select only 1 in buffer (write notes just for it) and hide others while editing.<br>
  How can I do this?</p>
  
  <pre><code>task-1
    subtask-1.1
    subtask-1.2
  task-2
    subtask2.1
  ...
  ...
  </code></pre>
  
  <p>For example I want to display for me only:</p>
  
  <pre><code>subtask-1.2
  (notes for this subtask)
  </code></pre>