tt-rss-android/org.fox.ttrss/src/main/res/layout-sw600dp-port/activity_detail.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/headlines"
    android:fitsSystemWindows="true"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">

    <include layout="@layout/toolbar" android:id="@+id/toolbar" />

    <FrameLayout
        android:id="@+id/sw600dp_anchor"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:visibility="gone" >
    </FrameLayout>

    <LinearLayout
        android:id="@+id/fragment_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:baselineAligned="false"
        android:orientation="horizontal"
        android:layout_below="@+id/toolbar">

        <FrameLayout
            android:paddingRight="4dp"
            android:id="@+id/headlines_fragment"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="0.4"
            android:background="?headlinesBackground" >
        </FrameLayout>

        <FrameLayout
            android:id="@+id/article_fragment"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="0.6"
            android:elevation="4dp"
            android:background="?articleBackground" >
        </FrameLayout>
    </LinearLayout>

</RelativeLayout>