Indeed, it is possible to directly enter a supplier number which existence is controlled in the Supplier file (that must be active) or use the contextual button to:
It is also possible to select a supplier via option Supplier of the product, obtained via the contextual menu associated with the product by right click.
A warning message is displayed when the supplier is in dispute. To delete a supplier from the list, it is necessary to either delete the line or uncheck the supplier in the quick select list Supplier selection.
When modifying the supplier on a purchase request line, the discounts and prices recalculation is suggested.