android/app/src/main/res/menu/menu_pdf_viewer.xml

<?xml version="1.0" encoding="utf-8"?>

<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    tools:context=".DeviceSetChooserActivity">
    <item
        android:id="@+id/action_settings"
        android:orderInCategory="100"
        app:showAsAction="never"
        android:title="@string/action_settings" />
    <item
        android:id="@+id/action_link_page"
        android:orderInCategory="50"
        app:showAsAction="never"
        android:checkable="true"
        android:checked="true"
        android:title="@string/action_link" />
</menu>