old_contents: from kivy.uix.screenmanager import Screen
  from kivy.lang import Builder
  from kivy.factory import Factory
  from functools import partial
  
  import webbrowser
  
  
  class ScreenAbout(Screen):
      Builder.load_string('''
  <ScreenAbout>
      spacing: dp(9)
      name: 'ScreenAbout'
      ScrollView
          id: scroll
          ScrollGrid
              AsyncImage
                  id: imgbt
                  allow_stretch: True
                  size_hint_y: None
                  height: dp(200)
              BackLabel
                  id: comm_desc
          ''')
  
      def on_pre_enter(self):
          self.ids.scroll.opacity = 0
  
      def on_enter(self, onsuccess=False):
          from network import get_data
          about = get_data('about', onsuccess=onsuccess)
  
          if not about:
              return
  
          about = about.get('0.0.1')[0]
          imbt = self.ids.imgbt
          imbt.source = about['logo']
          imbt.on_released = partial(webbrowser.open, about['website'])
  
          self.ids.comm_desc.text = about['about']
  
          Factory.Animation(opacity=1, d=.5).start(self.ids.scroll)
new_contents: from kivy.uix.screenmanager import Screen
  from kivy.lang import Builder
  from kivy.factory import Factory
  from functools import partial
  
  import webbrowser
  
  
  class ScreenAbout(Screen):
      Builder.load_string('''
  <ScreenAbout>
      spacing: dp(9)
      name: 'ScreenAbout'
      ScrollView
          id: scroll
          ScrollGrid
              AsyncImage
                  id: imgbt
                  allow_stretch: True
                  size_hint_y: None
                  height: dp(200)
              BackLabel
                  id: comm_desc
              FloatLayout
                  size_hint_y: None
                  height: dp(45)
                  ActiveButton
                      id: but
                      text: "Visit our website"
                      size_hint: None, None
                      width: dp(200)
                      center_x: comm_desc.center_x
                      top: comm_desc.y - dp(10)
          ''')
  
      def on_pre_enter(self):
          self.ids.scroll.opacity = 0
  
      def on_enter(self, onsuccess=False):
          from network import get_data
          about = get_data('about', onsuccess=onsuccess)
  
          if not about:
              return
  
          about = about.get('0.0.1')[0]
          imbt = self.ids.imgbt
          imbt.source = about['logo']
          self.ids.but.on_released = partial(webbrowser.open, about['website'])
  
          self.ids.comm_desc.text = about['about']
  
          Factory.Animation(opacity=1, d=.5).start(self.ids.scroll)
subject: Add button that links to website