[ADD] timesheet: doc about creating timesheets upon time off validation (#713)

timesheets/overview.rst

@@ -6,4 +6,5 @@ Overview
    :titlesonly:
 
    overview/get_started
-   overview/compare
+   overview/compare
+   overview/time_off

timesheets/overview/time_off.rst

@@ -0,0 +1,49 @@
+==========================================
+Create Timesheets upon Time Off Validation
+==========================================
+
+Odoo automatically timesheets on project/tasks upon time off requests. This allows for better
+overall control over the validation of timesheets, as it does not leave place for forgetfulness
+and questions after hours that have not been timesheeted by the employee.
+
+Activate the :doc:`Developer mode <../../general/developer_mode/activate>`, go to *Timesheets*,
+and change the *Project* and *Task* set by default, if you like.
+
+.. image:: media/record_time_off.png
+   :align: center
+   :alt: View of Timesheets setting enabling the feature record time off in Odoo Timesheets
+
+Go to :menuselection:`Time Off --> Configuration --> Time Off Types`. Select or create the
+needed type, and decide if you would like the requests to be validated or not.
+
+.. image:: media/time_off_types.png
+   :align: center
+   :alt: View of a time off types form emphasizing the time off requests and timesheets section in
+         Odoo Time Off
+
+| Now, once the employee has requested his time off and the request has been validated (or not,
+  depending on the setting chosen), the time is automatically allocated on *Timesheets*, under the
+  respective project and task.
+| On the example below, the user requested *Paid Time off* from July 13th to 15th.
+
+.. image:: media/time_off_request.png
+   :align: center
+   :alt: View of the time off request form in Odoo Time Off
+
+Considering that validation is not required, the requested time off is automatically displayed in
+*Timesheets*. If validation is necessary, the time is automatically allocated after the responsible
+person for validating does it so.
+
+.. image:: media/timesheets.png
+   :align: center
+   :alt: Video of timesheets emphasizing the requested time off from the employee in Odoo Timesheets
+
+Click on the magnifying glass, hovering over the concerned cell, to access all the aggregated data
+on that cell (day), and see details regarding the project/task.
+
+.. image:: media/timesheet_description.png
+   :align: center
+   :alt: View of the details of a project/task in Odoo Timeheets
+
+.. seealso::
+   - :doc:`compare`