The drag-and-drop builder has some limitations, but if you create a new print format with custom jinja formatting, the sky is the limit. You can create anything definable with procedurally generated HTML.
I think I described my problem not clearly and perhaps it is not the correct place - sorry for that. I try it again. My goal is that the user is able to create very easy a Quotation but we have some requirements. We need a way that the user could add the following block as much as he need it:
header - short text to give the block a name
description - some individual text eg. Text Editor
item list - the standard item list is fine from the look and feel
sum - the sum of this block
This block of header, description, item list and sum - our users need to add as much as they need. Currently I have no idea how to solve this problem. Thanks in advance for each hint