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_toggle"
            app:title="@string/app_theme"
            app:useSimpleSummaryProvider="true" />

        <SwitchPreferenceCompat
            android:icon="@drawable/ic_invert_colors"
            android:summary="@string/pure_theme_summary"
            app:defaultValue="false"
            app:key="pure_theme"
            app:title="@string/pure_theme" />

        <ListPreference
            android:icon="@drawable/ic_color"
            app:defaultValue="purple"
            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_label"
            app:defaultValue="always"
            app:entries="@array/labelVisibility"
            app:entryValues="@array/labelVisibilityValues"
            app:key="label_visibility"
            app:title="@string/navLabelVisibility"
            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 app:title="@string/player">

        <SwitchPreferenceCompat
            android:icon="@drawable/ic_caption"
            app:defaultValue="true"
            app:key="system_caption_style"
            app:title="@string/system_caption_style" />

        <Preference
            android:icon="@drawable/ic_settings"
            app:key="caption_settings"
            app:title="@string/caption_settings" />

    </PreferenceCategory>

</PreferenceScreen>