[ADD] Point of Sale: New doc about pricelists (#604)

point_of_sale/advanced_pricing_features.rst

@@ -9,4 +9,4 @@ Advanced Pricing Features
    advanced_pricing_features/seasonal_discount
    advanced_pricing_features/discount_tags
    advanced_pricing_features/loyalty
-
+   advanced_pricing_features/pricelists

point_of_sale/advanced_pricing_features/pricelists.rst

@@ -0,0 +1,46 @@
+=================================
+Using Pricelists in Point of Sale
+=================================
+
+You probably know the concept of happy hour: during a certain period of
+time, the barman gives a discount on some drinks (usually 50% off or a
+buy one get one free). When the period is over, prices go back to
+normal. But how does that relate with Odoo?
+
+In Odoo, you can set up happy hours. It’s one of the many possible uses
+of *Pricelists*. Those *Pricelists* allow the creation of
+multiple prices for the same product: a regular one and a special one
+for happy hours. Available in the *PoS* app, those are really
+convenient.
+
+Set up Pricelists
+=================
+
+To set up a *Pricelist*, go to :menuselection:`Point of Sale --> Configuration --> Configuration` 
+and enable the *Pricelist* feature. Then, go to :menuselection:`Point of Sale --> Configuration 
+--> Point of Sale` and enable *Pricelist* for the *PoS*.
+
+.. image:: media/pricelists_01.png
+   :align: center
+
+Now, you can create *Pricelists* by clicking on the *Pricelists* link. 
+Then, set it up by choosing the product category you want to include in your happy hour 
+and the discount.
+
+.. image:: media/pricelists_02.png
+   :align: center
+
+Go back to your *PoS* settings and add the Happy Hour pricelist to the
+list. You can even choose a default pricelist if needed.
+
+.. image:: media/pricelists_03.png
+   :align: center
+
+From now on, on the *PoS* interface, a new button is available, allowing you to choose
+among the different *pricelists* you added before.
+
+.. image:: media/pricelists_04.png
+   :align: center
+
+.. seealso::
+   * :doc:`../../sales/products_prices/prices/pricing`