Signal-Android/app/src/main/res/layout/image_editor_fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    tools:viewBindingIgnore="true"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <org.signal.imageeditor.core.ImageEditorView
        android:id="@+id/image_editor_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="top|center_horizontal"
        android:gravity="center"
        app:imageEditorView_blackoutColor="@color/signal_colorBackground" />

    <org.thoughtcrime.securesms.scribbles.ImageEditorHudV2
        android:id="@+id/scribble_hud"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</FrameLayout>