title: Display problem when changing of screen kivy
body: <p>I'm developing a kivy app with several screens. My problem is during the transition from a screen to another : when the app is running, a sort of &quot;merge&quot; between the two screens appears during 2 or 3 seconds (see screenshot below).</p>
  <p>I'm guessing it is due to the CPU load of my app, but is there a solution to wait for a page to be completely load to change screen ?
  (i'm running my app on an Raspberry pi 3 with a tactil screen)</p>
  <p>thank you in advance !</p>
  <h1>Screen 1</h1>
  <p><a href="https://i.stack.imgur.com/IrILk.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/IrILk.png" alt="screen 1" /></a></p>
  <h1>Screen 2</h1>
  <p><a href="https://i.stack.imgur.com/UvZhS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/UvZhS.png" alt="screen 2" /></a></p>
  <p>EDIT : A first solution could be to multithread my kivy app. I don't know yet how, but <a href="https://github.com/kivy/kivy/wiki/Working-with-Python-threads-inside-a-Kivy-application" rel="nofollow noreferrer">this</a> could be helpful</p>