[ADD] pos: add a doc about tracking numbers in pos

Task ID: 2622088

closes odoo/documentation#2451

X-original-commit: 235d2ad749
Signed-off-by: Antoine Vandevenne (anv) <anv@odoo.com>
Signed-off-by: Perazzo Loredana (lrpz) <lrpz@odoo.com>
Co-authored-by: Robin Boisdenghien <robo@odoo.com>

content/applications/sales/point_of_sale/shop.rst

@@ -13,3 +13,4 @@ Shop Features
    shop/multicashiers
    shop/reprint
    shop/cash_rounding
+   shop/serial_numbers

content/applications/sales/point_of_sale/shop/serial_numbers.rst

@@ -0,0 +1,60 @@
+=======================
+Serial numbers and lots
+=======================
+
+Working with **serial numbers** and **lots** allows tracking your products' movements. When products
+are tracked, the system identifies their location based on their last movement.
+
+To enable traceability, go to :menuselection:`Point of Sale --> Products --> Products`. Then,
+select a product and check the :guilabel:`Tracking By Unique Serial Number` or the
+:guilabel:`Tracking By Lots` box in the :guilabel:`Inventory` tab.
+
+.. image:: serial_numbers/product-form-traceability.png
+   :align: center
+   :alt: Enable traceability settings
+
+Serial numbers and lots importation
+===================================
+
+You can import serial numbers in Point of Sale. To do so, select a **sales order** or a
+**quotation** containing tracked products. Then, agree to load the **Lots or Serial Numbers** linked
+to the :abbr:`SO (sales order)`.
+
+.. image:: serial_numbers/importing-sn.png
+   :align: center
+   :width: 480
+   :alt: Pop-up window for serial number import
+
+The imported tracking numbers appear below the tracked products. You can modify them by clicking on
+the list-view button next to the products.
+
+.. image:: serial_numbers/pos-sn-imported.png
+   :align: center
+   :width: 480
+   :alt: Pop-up window for serial number import
+
+.. seealso::
+   - :doc:`../shop/sales_order`
+
+Serial numbers and lots creation
+================================
+
+If a tracked product is available in your POS, adding the product to the cart opens a pop-up window
+where you can type or scan the product's serial or lot numbers. To add more than one of the same
+tracked products, click on **enter** to validate and start a new line.
+
+.. image:: serial_numbers/create-change-sn.png
+   :align: center
+   :width: 480
+   :alt: adding new serial and lots numbers
+
+.. note::
+   - Changing a tracked product's quantity using the numpad turns the list-view button red. Click on
+     it to add the missing lot and serial numbers.
+   - :guilabel:`Lot & Serial Number(s)` are :guilabel:`required` on tracked products but not
+     mandatory. Meaning that not attributing some or any does **not** prevent from completing the
+     sale.
+
+.. seealso::
+   - :doc:`/applications/inventory_and_mrp/inventory/management/lots_serial_numbers/serial_numbers`
+   - :doc:`/applications/inventory_and_mrp/inventory/management/lots_serial_numbers/lots`