I just download your great plugin and i try to add custom fields on the invoice with the method explain on the FAQ :
How do I add more info or custom fields to the templates?
Create a custom template (see questions above). Then edit the file to your needs. You can use all functions that are available in WordPress or any activated plugin or theme.
Example: Show an order custom field that was added by another plugin (e.g. '_my_custom_field')
But that doesn't work.
Can you help me please.
Thanks for your time.