<MainScreen>
    kv_text1: text1
    kv_text2: text2
    GridLayout:
        cols:1
        size: root.width-200, root.height-200
        pos: 100, 100

        GridLayout:
            cols:2
            Label:        
                text: "Text1"
            TextInput:
                id: text1
                multiline:False
            Label:                
                text: "Text2"
            TextInput:
                id: text2
                multiline:False
        Button:
            text: "ButtonText"
            on_press: root.btn_press()