grid3.kv

GridLayoutExample:
<GridLayoutExample>:
    # rows
    # cols
    #cols: 3
    rows: 2
    Button:
        text: "How"
        size_hint: None, 1
        width: "200dp"
    Button:
        text: "Are"
        size_hint: None, 1
        width: "200dp"
    BoxLayoutExample:
    Button:
        text: "You"
    Button:
        text: "Hope"
        size_hint: None, 1
        width: "100dp"
    Button:
        text: "Everything"
    Button:
        text: "Fine"
<BoxLayoutExample>:
    orientation: "horizontal"
    Button:
        text: "A"

        size_hint: .5, .5
        # size: "100dp", "60dp"
        # width: "100dp"
        # height: "60dp"
        # x, center_x, right
        # y, center_y, top
        pos_hint: { "center_y": .5 }

    BoxLayout:
        orientation: "vertical"
        spacing: "10dp"
        Button:
            text: "B1"
        Button:
            text: "B2"
        Button:
            text: "B3"
        Button:
            text: "B4"
    Label:
        text: "C"