In all sales and purchase documents (quotes, orders, blanket orders, invoices, credit notes, returns), a Model assistant is available in the document lines. Select 1 of the items from a desired model and select Model Assistant in the Manage menu:

All items and variants of the model from the selected item in the document line are displayed on an assist page. The most used fields can be edited (e.g. quantity, price, line discounts). Factbox information is available for each individual item variant.

On closing the assist page, the document lines are maintained accordingly.