[IMP] general: add notes about dev mode toggle

closes odoo/documentation#3140

Signed-off-by: Antoine Vandevenne (anv) <anv@odoo.com>

content/applications/general/developer_mode.rst

@@ -4,53 +4,96 @@
 Developer Mode (debug mode)
 ===========================
 
-The developer mode (or debug mode) gives you access to extra and advanced tools.
+The developer mode (or debug mode) unlocks access to extra and advanced tools in Odoo. There are
+several ways to activate the developer mode: through the
+:ref:`settings <general/developer_mode/settings>`, the
+:ref:`browser extension <general/developer_mode/browser-extension>`, through
+the :ref:`command palette <general/developer_mode/command-palette>`  or the
+:ref:`URL <general/developer_mode/url>`.
+
+.. _general/developer_mode/settings:
 
 Activate through the Settings
 =============================
 
-Go to :menuselection:`Settings --> Activate the developer mode`.
+The debug mode can be activated in the Odoo database settings. Go to :menuselection:`Settings -->
+General Settings --> Developer Tools` and click on :guilabel:`Activate the developer mode`. At
+least one application needs to be installed for the :guilabel:`Developer Tools` section to appear
+in the :guilabel:`Settings` module.
 
 .. image:: developer_mode/settings.png
    :align: center
-   :alt: Overview of the debug options under settings in Odoo
+   :alt: Overview of the debug options under settings in Odoo.
 
 .. note::
-   *Activate the developer mode (with assets)* is used by developers; *Activate the developer mode
+   :guilabel:`Activate the developer mode (with assets)` is used by developers; :guilabel:`Activate
-   (with tests assets)* is used by developers and testers.
+   the developer mode (with tests assets)` is used by developers and testers.
 
-Once activated, the *Deactivate the developer mode* option becomes available.
+Once activated, the :guilabel:`Deactivate the developer mode` option becomes available.
 
-Activate through a browser extension
+.. _general/developer_mode/browser-extension:
+
+Activate through the browser extension
+======================================
+
+Within a web browser, navigate to the browser settings and extensions and search for the `Odoo
+Debug` extension. Once the extension is installed, a new icon will be shown on the browser's
+toolbar.
+
+For the *Odoo Debug* extension, a single click enables a normal version of the mode, while a
+double click enables it with assets. To deactivate it, use a single click.
+
+.. image:: developer_mode/developer-mode-monkey.png
+   :align: center
+   :alt: View of Odoo's debug icon in a Google Chrome toolbar.
+
+.. _general/developer_mode/command-palette:
+
+Activate through the command palette
 ====================================
 
-| Go to the settings and extensions of your web browser, and search for *Odoo Debug*. Once the
+In Odoo, the command palette tool has a command to activate the debug mode. First, open the command
-  extension is installed, a new icon will be shown on your toolbar.
+palette tool with the keyboard shortcut `ctrl+k` and then type `debug`. A command will show up to
-| For the *Odoo Debug* extension, a single click enables a normal version of the mode, while a
+activate the debug mode.
-  double click enables it with assets. To deactivate it, use a single click.
 
-.. image:: developer_mode/monkey.png
+.. image:: developer_mode/command-palette.png
    :align: center
-   :alt: View of odoo’s debug icon in a chrome’s toolbar
+   :alt: Command palette with debug command.
+
+.. _general/developer_mode/url:
 
 Activate through the URL
 ========================
 
-In the URL add ``?debug=1`` or ``?debug=true`` after *web*.
+The debug mode can also be activated by adding an extra query string to the database's URL. In the
+URL, add `?debug=1` or `?debug=true` after `/web`. To deactivate the debug mode, change the
+value to `?debug=0` instead.
 
 .. image:: developer_mode/url.png
    :align: center
-   :alt: Overview of an url with the debug mode command added in Odoo
+   :alt: Overview of a URL with the debug mode command added.
 
 .. tip::
-   Developers: type ``?debug=assets`` and activate the mode with assets.
+   Additional modes are available for developers: `?debug=assets` enables the assets mode, and
+   `?debug=tests` enables the tests mode.
 
-Locate the mode tools
+.. _developer-mode/mode-tools:
-=====================
 
-The Developer mode tools can be accessed from the *Open Developer Tools* button, located on the
+Locate the developer mode tools
-header of your pages.
+===============================
 
-.. image:: developer_mode/button_location.png
+Once developer mode is activated, the developer mode tools can be accessed from the :guilabel:`Open
+Developer Tools` button, the bug icon located in the header of the Odoo database.
+
+.. image:: developer_mode/button-location.png
    :align: center
-   :alt: Overview of a console page and the debug icon being shown in Odoo
+   :alt: Overview of a console page and the debug icon being shown in Odoo.
+
+This menu contains additional tools that are useful to understand or edit technical data, such as
+the views or actions of a page. On a page that has filters, actions, and view options, the
+developer mode tools contain some useful menu items such as:
+
+- :guilabel:`Edit Action`
+- :guilabel:`Manage Filters`
+- Edit the current view (e.g. Kanban, List, Graph, etc.)
+- See the :guilabel:`Fields View Get`