tachiyomi/app/src/main/res/layout/reader_pager_settings.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/pager_prefs"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="24dp"
        android:text="@string/pager_viewer"
        android:textColor="?attr/colorAccent"
        android:textStyle="bold"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/pager_nav_text"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:text="@string/pref_viewer_nav"
        app:layout_constraintBaseline_toBaselineOf="@id/pager_nav"
        app:layout_constraintEnd_toStartOf="@id/verticalcenter"
        app:layout_constraintStart_toStartOf="parent" />

    <androidx.appcompat.widget.AppCompatSpinner
        android:id="@+id/pager_nav"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:entries="@array/pager_nav"
        app:layout_constraintEnd_toEndOf="@id/spinner_end"
        app:layout_constraintStart_toEndOf="@id/verticalcenter"
        app:layout_constraintTop_toBottomOf="@id/pager_prefs" />

    <TextView
        android:id="@+id/tapping_inverted_text"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:text="@string/pref_read_with_tapping_inverted"
        app:layout_constraintBaseline_toBaselineOf="@id/tapping_inverted"
        app:layout_constraintEnd_toStartOf="@id/verticalcenter"
        app:layout_constraintStart_toStartOf="parent" />

    <androidx.appcompat.widget.AppCompatSpinner
        android:id="@+id/tapping_inverted"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:entries="@array/invert_tapping_mode"
        app:layout_constraintEnd_toEndOf="@id/spinner_end"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toEndOf="@id/verticalcenter"
        app:layout_constraintTop_toBottomOf="@+id/pager_nav" />

    <TextView
        android:id="@+id/scale_type_text"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:text="@string/pref_image_scale_type"
        app:layout_constraintBaseline_toBaselineOf="@id/scale_type"
        app:layout_constraintEnd_toStartOf="@id/verticalcenter"
        app:layout_constraintStart_toStartOf="parent" />

    <androidx.appcompat.widget.AppCompatSpinner
        android:id="@+id/scale_type"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:entries="@array/image_scale_type"
        app:layout_constraintEnd_toEndOf="@id/spinner_end"
        app:layout_constraintStart_toEndOf="@id/verticalcenter"
        app:layout_constraintTop_toBottomOf="@+id/tapping_inverted" />

    <TextView
        android:id="@+id/zoom_start_text"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:text="@string/pref_zoom_start"
        app:layout_constraintBaseline_toBaselineOf="@id/zoom_start"
        app:layout_constraintEnd_toStartOf="@id/verticalcenter"
        app:layout_constraintStart_toStartOf="parent" />

    <androidx.appcompat.widget.AppCompatSpinner
        android:id="@+id/zoom_start"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:entries="@array/zoom_start"
        app:layout_constraintEnd_toEndOf="@id/spinner_end"
        app:layout_constraintStart_toEndOf="@id/verticalcenter"
        app:layout_constraintTop_toBottomOf="@id/scale_type" />

    <com.google.android.material.switchmaterial.SwitchMaterial
        android:id="@+id/crop_borders"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:text="@string/pref_crop_borders"
        android:textColor="?android:attr/textColorSecondary"
        app:layout_constraintTop_toBottomOf="@id/zoom_start" />

    <com.google.android.material.switchmaterial.SwitchMaterial
        android:id="@+id/dual_page_split"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/pref_dual_page_split"
        android:textColor="?android:attr/textColorSecondary"
        app:layout_constraintTop_toBottomOf="@id/crop_borders" />

    <com.google.android.material.switchmaterial.SwitchMaterial
        android:id="@+id/dual_page_invert"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/pref_dual_page_invert"
        android:textColor="?android:attr/textColorSecondary"
        android:visibility="gone"
        app:layout_constraintTop_toBottomOf="@id/dual_page_split"
        tools:visibility="visible" />

    <androidx.constraintlayout.widget.Group
        android:id="@+id/tapping_prefs_group"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:constraint_referenced_ids="pager_nav_text,pager_nav,tapping_inverted_text,tapping_inverted,dual_page_split,dual_page_invert" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/verticalcenter"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.5" />

    <android.widget.Space
        android:id="@+id/spinner_end"
        android:layout_width="16dp"
        android:layout_height="0dp"
        app:layout_constraintStart_toEndOf="parent"
        tools:ignore="MissingConstraints" />

</androidx.constraintlayout.widget.ConstraintLayout>