Altering the picking slip details

-- HikaShop version -- : 2.3.5
-- Joomla version -- : 3.3.6
-- PHP version -- : 5.4.32

Hi,
With our joomla site I want to add a custom field to the picking sheet. I have added the field to the customer details and populated it but I also want to get it to appear on the picking sheet.

Is there a template I can alter or something similar that will allow me to do this?

Thanks

Hello,
What do you exactly mean by :

I also want to get it to appear on the picking sheet.

Tanks for answering Mohamed,
I managed to find what I needed by digging through the templates.
The Order/Invoice template controls the details of the picking sheet and by digging through the $user object I found the array that held my custom field. Then it was simple matter of echoing it where I wanted it.