LibreTube/app/src/main/res/xml/appearance_settings.xml

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <PreferenceCategory app:title="@string/appearance">

        <ListPreference
            android:icon="@drawable/ic_theme"
            app:defaultValue="A"
            app:entries="@array/themes"
            app:entryValues="@array/themesValue"
            app:key="theme_togglee"
            app:title="@string/app_theme"
            app:useSimpleSummaryProvider="true" />

        <ListPreference
            android:icon="@drawable/ic_color"
            app:defaultValue="red"
            app:entries="@array/accents"
            app:entryValues="@array/accentsValue"
            app:key="accent_color"
            app:title="@string/color_accent"
            app:useSimpleSummaryProvider="true" />

        <ListPreference
            android:icon="@drawable/ic_frame"
            app:defaultValue="MainActivity"
            app:entries="@array/icons"
            app:entryValues="@array/iconsValue"
            app:key="icon_change"
            app:title="@string/app_icon"
            app:useSimpleSummaryProvider="true" />

    </PreferenceCategory>

    <PreferenceCategory app:title="@string/app_behavior">

        <ListPreference
            android:icon="@drawable/ic_home"
            app:defaultValue="home"
            app:entries="@array/tabs"
            app:entryValues="@array/tabsValue"
            app:key="default_tab"
            app:title="@string/defaultTab"
            app:useSimpleSummaryProvider="true" />

        <ListPreference
            android:icon="@drawable/ic_grid"
            app:defaultValue="@integer/grid_items"
            app:entries="@array/grid"
            app:entryValues="@array/grid"
            app:key="grid"
            app:title="@string/grid"
            app:useSimpleSummaryProvider="true" />

    </PreferenceCategory>

    <PreferenceCategory>

        <SwitchPreference
            android:defaultValue="true"
            android:icon="@drawable/ic_list"
            app:key="related_streams_toggle"
            app:summary="@string/related_streams_summary"
            app:title="@string/related_streams" />

    </PreferenceCategory>

</PreferenceScreen>