- Define a *product set* as sales manager:  
  - choose products
  - for each product, define a quantity.
  - for each product (if Discounts setting is active), define a
    discount or leave default value
  - Sort *set* lines, this order will be the default when added into the
    quotation
- Then you can remove or update added lines as any other sales order
  lines.

![Sale order](/sale_product_set/static/description/sale_order.png)