tachiyomi/app/src/main/res/menu/manga_details.xml

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

    <item
        android:id="@+id/action_search"
        android:icon="@drawable/ic_search_white_24dp"
        android:title="@string/action_search"
        app:actionViewClass="androidx.appcompat.widget.SearchView"
        app:showAsAction="collapseActionView|ifRoom" />

    <item
        android:id="@+id/action_download"
        android:icon="@drawable/ic_file_download_white_24dp"
        android:title="@string/action_download"
        app:showAsAction="ifRoom">
        <menu>
            <item
                android:id="@+id/download_next"
                android:title="@string/download_first" />
            <item
                android:id="@+id/download_next_5"
                android:title="@string/download_5" />
            <item
                android:id="@+id/download_custom"
                android:title="@string/download_custom" />
            <item
                android:id="@+id/download_unread"
                android:title="@string/download_unread" />
            <item
                android:id="@+id/download_all"
                android:title="@string/download_all" />
        </menu>
    </item>

    <item
        android:id="@+id/action_mark_all_as_read"
        android:icon="@drawable/ic_done_all_white_24dp"
        android:title="@string/action_mark_all_as_read"
        app:showAsAction="never" />

    <item
        android:id="@+id/action_mark_all_as_unread"
        android:icon="@drawable/ic_done_all_white_24dp"
        android:title="@string/action_mark_all_as_unread"
        app:showAsAction="never" />

    <item
        android:id="@+id/action_edit"
        android:icon="@drawable/ic_edit_white_24dp"
        android:title="@string/action_edit"
        app:showAsAction="never" />

    <item
        android:id="@+id/action_add_to_home_screen"
        android:title="@string/action_add_to_home_screen"
        app:showAsAction="never" />

</menu>