I have a custom field called "newsletter", I've mapped this to order_custom2 from within the store settings and used the following code:
<div class="control-group {if error:order_custom2}error{/if}">
<label class="control-label" for="order_custom2">Newsletter</label>
<div class="controls">
{field:order_custom2} {error:order_custom2}
</div>
</div>
However it's outputting the field as a input text box rather than a select box (it was set as a select box in the member preferences) and I can't work out how to change it from a text field to a select box, any ideas?