test_app/public/phpMyAdmin4.8.5/templates/table/structure/partition_definition_form.twig

<form action="tbl_structure.php" method="post">
    {{ Url_getHiddenInputs(db, table) }}
    <input type="hidden" name="edit_partitioning" value="true" />

    <fieldset>
        <legend>{% trans 'Edit partitioning' %}</legend>
        {% include 'columns_definitions/partitions.twig' with {
            'partition_details': partition_details
        } only %}
    </fieldset>
    <fieldset class="tblFooters">
        <input type="submit" name="save_partitioning" value="{% trans 'Save' %}">
    </fieldset>
</form>