title: Page popup from bottom flutter
body: <p>I have an app and i wanted to add page thad slides from the bottom up, ultill three quarters of the screen, just as shown in the picture here<a href="https://i.stack.imgur.com/bmfuq.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/bmfuq.png" alt="enter image description here" /></a></p>
  <p>and if you press the arrow it will go back again.</p>
  <p><a href="https://i.stack.imgur.com/BdY7Q.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/BdY7Q.png" alt="enter image description here" /></a></p>
  <p>As you can see, once you press the food system, that threee quarter page will pop up. I have the onclock and everython ready but i just dont know what to use once you press it.</p>