cx-newsletter/renders/single_customer.html

<div class="section">
    <span class="title">
        {{? Customer }}: #{{$ id }}
    </span>

    <span class="separator"></span>

    <form action="" method="post">
        <input 
            type="text"
            name="id"
            value="{{$ id }}"
            style="display: none;"
        >

        {{> customer_fields.html }}

        <div class="group">
            <input
                type="submit"
                name="save"
                value="{{? Save }}"
            >

            <input
                type="submit"
                name="remove"
                value="{{? Remove }}"
            >
        </div>
    </form>
</div>