
Inside a purchase order, you can click on "Add products", to open a product tree view, then update "qty to purchase" field.

.. image:: ../static/description/01_purchase_order_create.png
    :width: 800 px
    :alt: Purchase order create

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.. image:: ../static/description/02_purchase_order_add_product.png
    :width: 800 px
    :alt: Purchase order Add product

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The update of "qty to purchase" will add new purchase line or update the existing line. If qty to purchase is 0 it purchase line will deleted if it exists.

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.. image:: ../static/description/03_purchase_order_updated.png
    :width: 800 px
    :alt: Purchase order updated

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.. image:: ../static/description/04_purchase_order_update_product_qty.png
    :width: 800 px
    :alt: Purchase order update product qty.
