[IMP] pos: remove duplicate of set customer and update sections accordingly

task-3366190

closes odoo/documentation#6606

Signed-off-by: Loredana Perazzo (lrpz) <lrpz@odoo.com>

content/applications/finance/accounting/get_started/cheat_sheet.rst

@@ -129,6 +129,8 @@ Example
 
       .. placeholder
 
+.. _cheat_sheet/journals:
+
 Journal entries
 ===============
 

content/applications/sales/point_of_sale.rst

@@ -51,14 +51,19 @@ Once an order is completed, proceed to checkout by clicking :guilabel:`Payment`.
 Set customers
 =============
 
-You can create and set customers from an :ref:`open POS session <pos/session-start>`. Registering
-your customer is necessary to :doc:`collect their loyalty points and grant them rewards
+Registering your customer is necessary to :doc:`collect their loyalty points and grant them rewards
 <point_of_sale/pricing/loyalty>`, automatically apply the :doc:`attributed pricelist
 <point_of_sale/pricing/pricelists>`, or :ref:`generate and print an invoice
 <receipts-invoices/invoices>`.
 
-To access the list of customers, click :guilabel:`Customer` on the POS interface. Then, select a
-customer or create a new one by clicking :guilabel:`Create`, completing the form, and saving.
+You can create customers from an :ref:`open POS session <pos/session-start>` by clicking
+:menuselection:`Customer --> Create`, and filling in the contact information. You can also create
+customers from the backend by going to :menuselection:`Point of Sale --> Orders --> Customers` and
+clicking :guilabel:`New`. Then, fill in the information and save.
+
+To set a customer during an order, access the list of customers by clicking :guilabel:`Customer` on
+the POS interface. You can also set a customer at the payment screen by clicking
+:guilabel:`Customer`.
 
 .. _pos/customer-notes:
 

content/applications/sales/point_of_sale/receipts_invoices.rst

@@ -39,41 +39,38 @@ select the corresponding order and click :guilabel:`Print Receipt`.
 Invoices
 ========
 
-In Point of Sale, you can issue and print invoices upon payment at the cash register or retrieve all
-the past invoiced orders.
-
-Set a customer
---------------
-
-First, you need to open a session and set your customer. Open the **POS interface** by going to
-:menuselection:`Point of Sale --> New session --> Open session`. Then, click :guilabel:`Customer` to
-access the list of **customers**.
-
-.. image:: receipts_invoices/select-customer-ui.png
-   :alt: customer selection and creation button
-
-From there, you can either set an existing customer by clicking their name or create a new one by
-clicking :guilabel:`Create`. Doing so opens a customer creation form to fill in with their
-information. Click :guilabel:`Save` to validate and set this new customer.
+Point of Sale allows you to issue and print invoices for :ref:`registered customers <pos/customers>`
+upon payment and retrieve all past invoiced orders.
 
 .. note::
-   - You can also **edit** a customer's information by clicking :guilabel:`Details`.
-   - If you did not set your customer during the order, you can do so at the payment screen by
-     clicking :guilabel:`Customer`.
+   An invoice created in a POS creates an entry into the corresponding :ref:`accounting journal
+   <cheat_sheet/journals>`, previously :ref:`set up <receipts_invoices/invoice_configuration>`.
+
+.. _receipts_invoices/invoice_configuration:
+
+Configuration
+-------------
+
+To define what journals will be used for a specific POS, go to the :ref:`POS' settings
+<configuration/settings>` and scroll down to the accounting section. Then, you can determine the
+accounting journals used by default for orders and invoices in the :guilabel:`Default Journals`
+section.
+
+.. image:: receipts_invoices/invoice-config.png
+   :alt: accounting section in the POS settings
 
 Invoice a customer
 ------------------
 
-Once an order is done, click :guilabel:`Payment` to move to the **payment screen**. Click
-:guilabel:`Invoice` underneath the customer's name to enable issuing and printing invoices upon
-payment.
-
-.. image:: receipts_invoices/invoice-button.png
-   :alt: button to generate an invoice in POS
+Upon processing a payment, click :guilabel:`Invoice` underneath the customer's name to issue an
+invoice for that order.
 
 Select the payment method and click :guilabel:`Validate`. The **invoice** is automatically issued
 and ready to be downloaded and/or printed.
 
+.. note::
+   To be able to issue an invoice, a :ref:`customer <pos/customers>` must be selected.
+
 Retrieve invoices
 -----------------