Is it possible to easily edit the template that's being used for the layout of an invoice?
You just edit it using the normal Joomla Editor (WYSIWYG), so yes it's very easy.
That's an automatically generated code in a fixed format like +++123/1234/12345+++. It's calculated based upon an invoice number or something else. When the invoice gets paid, bookkeeping programs can automatically match this code with a payment, resulting in a high level of efficiency. Without this possibility, we can't use CompoJoom for our clients...
Hmm you can add this number by creating a new booking placeholders (e.g. MAT_BOOKING_STRUCTURED_COM) using plugins or modifying the code, that isn't very complicated, should be minutes for any programer.
Kind regards,
Yves