k-9/res/layout/message_view_body.xml

<?xml version="1.0" encoding="utf-8"?>
<merge
        xmlns:android="http://schemas.android.com/apk/res/android"
    >
    <LinearLayout
        android:id="@+id/show_pictures_section"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="6dip"
        android:paddingLeft="6dip"
        android:paddingRight="3dip"
        android:paddingTop="4dip"
        android:paddingBottom="4dip"
        android:baselineAligned="false"
        android:visibility="gone">
        <TextView
            android:textAppearance="?android:attr/textAppearanceSmall"
            android:textColor="?android:attr/textColorSecondary"
            android:text="@string/message_view_show_pictures_instructions"
            android:layout_gravity="center"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:layout_weight="1.0" />
     <Button android:id="@+id/show_pictures"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/message_view_show_pictures_action" />
    </LinearLayout>
    <LinearLayout
        android:id="@+id/layout_decrypt"
        android:orientation="horizontal"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:visibility="gone">

        <LinearLayout
            android:id="@+id/crypto_signature"
            android:orientation="horizontal"
            android:layout_height="wrap_content"
            android:layout_width="0dip"
            android:layout_weight="2"
            android:gravity="center_vertical">

            <RelativeLayout
                android:layout_height="wrap_content"
                android:layout_width="wrap_content">

                <ImageView
                    android:id="@+id/ic_crypto_signature"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:src="@drawable/signed_large"/>

                <ImageView
                    android:id="@+id/ic_crypto_signature_status"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:src="@drawable/overlay_error"/>

            </RelativeLayout>

            <LinearLayout
                android:orientation="vertical"
                android:layout_height="wrap_content"
                android:layout_width="wrap_content"
                android:paddingLeft="5dip">

                <TextView
                    android:id="@+id/userId"
                    android:textAppearance="?android:attr/textAppearanceMedium"
                    android:ellipsize="end"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="left"/>

                <TextView
                    android:id="@+id/userIdRest"
                    android:textAppearance="?android:attr/textAppearanceSmall"
                    android:ellipsize="end"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="left"/>

            </LinearLayout>

        </LinearLayout>

        <Button
            android:text="@string/btn_decrypt"
            android:id="@+id/btn_decrypt"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:layout_weight="1"/>

    </LinearLayout>
<LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/body_container"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        >
    <!-- Content area -->
    <com.fsck.k9.view.MessageWebView
        android:id="@+id/message_content"
        android:layout_height="wrap_content"
        android:layout_width="fill_parent" />
    <com.fsck.k9.view.AccessibleWebView
        android:id="@+id/accessible_message_content"
        android:layout_height="wrap_content"
        android:layout_width="fill_parent" />
    <!-- Attachments area -->
    <LinearLayout
        android:id="@+id/attachments"
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:padding="4dip" />
    <Button android:id="@+id/download_remainder"
        android:text="@string/message_view_download_remainder"
        android:layout_height="wrap_content"
        android:visibility="gone"
        android:layout_width="fill_parent" />
</LinearLayout>
</merge>