title: How to make vertical switch-case like this?
body: <p>I want to create an activity diagram in <code>plantuml</code> with some operators selection <code>if elseif</code> (switch - case), which lead to 2 decisions. I created such diagram, but it has horizontal layout. 
  What i get;</p>
  
  <pre><code>@startuml
  
  start
  :start;
  
  
  if (some question) then (no)
  
  elseif (some question) then (no)
  
  elseif (some question) then (no)
  
  
  else (yes)
   : decision 2;
  stop
  
  endif
  : decision 1;
  stop
  @enduml
  </code></pre>
  
  <p>What i want:
  <img src="https://i.stack.imgur.com/lvbmx.png" alt="desired diagram"></p>