linphone-android/app/src/main/res/layout/welcome_page_3.xml

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_height="match_parent"
    android:layout_width="match_parent"
    android:fillViewport="true">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_height="wrap_content"
        android:layout_width="match_parent">

        <ImageView
            android:id="@+id/image"
            android:layout_width="wrap_content"
            android:layout_height="@dimen/welcome_icon_size"
            android:layout_marginTop="80dp"
            android:src="@drawable/welcome_open_source_logo"
            android:contentDescription="@null"
            app:tint="?attr/color_main1_500"
            app:layout_constraintDimensionRatio="1:1"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent" />

        <androidx.appcompat.widget.AppCompatTextView
            style="@style/default_text_style_800"
            android:id="@+id/page_title"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="20dp"
            android:text="@string/welcome_page_3_title"
            android:textColor="?attr/color_main2_600"
            android:textSize="29sp"
            android:gravity="center"
            app:layout_constraintTop_toBottomOf="@id/image"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"/>

        <androidx.appcompat.widget.AppCompatTextView
            style="@style/default_text_style"
            android:id="@+id/message"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginEnd="16dp"
            android:layout_marginTop="25dp"
            android:text="@string/welcome_page_3_message"
            android:textColor="?attr/color_main2_600"
            android:textSize="14sp"
            android:gravity="center"
            app:layout_constraintTop_toBottomOf="@id/page_title"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"/>

    </androidx.constraintlayout.widget.ConstraintLayout>

</ScrollView>