k-9/res/layout/message_view.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <com.fsck.k9.view.ToggleScrollView
        android:id="@+id/top_view"
        android:layout_width="fill_parent"
        android:layout_height="0dip"
        android:layout_weight="1"
        android:scrollbarStyle="outsideInset"
        android:fillViewport="true"
        android:background="@android:color/transparent"
        android:fadingEdge="none">
        <LinearLayout
            android:orientation="vertical"
            android:layout_width="fill_parent"
            android:background="@android:color/transparent"
            android:layout_height="wrap_content"
            android:layout_weight="1">
            <include layout="@layout/message" />
            <include layout="@layout/message_view_scrolling_buttons"/>
        </LinearLayout>
    </com.fsck.k9.view.ToggleScrollView>
    <include layout="@layout/message_view_move_buttons"/>
    <include layout="@layout/message_view_bottom_buttons"/>
</LinearLayout>