I've read multiple threads about customizing reports in Odoo 8, but could find an answer to my question:
How can we edit the invoice template in Odoo 8? In OpenERP7 we used make files to edit invoices, but it seems that webkit is obsolete.
Trying to change the document type from PDF to Webkit did not help as we were unable to locate the .mako files.
We tried the qWeb editor as suggested in this thread (https://www.odoo.com/forum/help-1/question/is-there-any-way-to-preview-webkit-report-layout-while-coding-maybe-wysiwyg-editor-52307#answer-52417), but this only edits the layout.
We need to be able to add variables (BBA structured ref, expiration date, dank details,...) and the PDF wich is attached to the outgoing mail template should also be updated.