title: R: display mode for single-file shiny app
body: <p>When using two files (ui.R and server.R), one can change display mode with:</p>
  
  <pre><code>runApp("MyApp", display.mode = "showcase")
  </code></pre>
  
  <p>How can I set display mode to "showcase" for single-file shiny app?</p>
  
  <p>Thx!</p>