[TASK] Update System modules section

Releases: main, 13.4, 12.4

Author: linawolf

Documentation/Concepts/Backend/SystemModules/Index.rst

@@ -1,77 +1,113 @@
+:navigation-title: System modules
 .. include:: /Includes.rst.txt
-.. index:: Modules; System
 .. _system-modules:
 
 ==============
 System modules
 ==============
 
-.. important::
+The backend modules in group system are only available to backend users with
+admin permissions.
 
-   This chapters cover modules that will only be available for backend users
-   with admin access privileges.
+Some modules are only available when you have an optional system extension
+installed. If you want to see all available modules you can also make a
+full TYPO3 install, see `https://get.typo3.org/misc/composer/helper`__.
 
-In the :ref:`User Management <t3coreapi:user-management>` chapter we covered the
-*Access* and *Backend Users* module. In this section we take a look
-at the remaining modules.
+..  contents:: Backend modules in group "System"
 
+.. _system-modules-permissions:
 
-.. index:: Modules; Log
-.. _system-modules-log:
+Permissions
+===========
 
-Log
-===
+The module :guilabel:`System > Permissions` can be used to view or edit
+backend user permissions for pages in the backend.
 
-The TYPO3 CMS backend logs a number of actions performed by backend users:
-login, cache clearing, database entries (creation, update, deletion),
-settings changes, file actions and errors. A number of filters are
-available to help filter this data.
+See also TYPO3 Explained,
+:ref:`Permissions management <t3coreapi:permissions-management>`.
 
-.. include:: /Images/AutomaticScreenshots/Modules/LogModule.rst.txt
+.. _system-modules-backend-users:
 
-.. index:: Modules; DB check
-.. _system-modules-dbcheck:
+Backend Users
+=============
 
-DB check
-========
+The module :guilabel:`System > Backend Users` is used to create, edit and delete
+backend users.
 
-.. important::
+See also TYPO3 Explained,
+:ref:`Backend user management <t3coreapi:user-management>`.
 
-   "DB check and :ref:`system-modules-configuration` are only available
-   if the system extension "lowlevel" was installed and activated.
+.. _system-modules-reactions:
 
-   For Composer based systems (see also :ref:`installing-extensions`):
+Reactions (optional)
+====================
 
-   .. code-block:: bash
+This module is only available if the system extension
+:composer:`typo3/cms-reactions` is installed. This extension handles **incoming**
+webhooks to TYPO3. It also provides a corresponding backend module to manage
+reaction records.
 
-      composer req typo3/cms-lowlevel
+It has its own manual:
+:ref:`TYPO3 Reactions <typo3/cms-reactions:start>`.
 
+.. _system-modules-webhooks :
 
-The *Database (DB) check* module offers four functions related
-to the database and its content.
+Webhooks (optional)
+===================
+
+This module is only available if the system extension
+:composer:`typo3/cms-webhooks` is installed. This extension handles **outgoing**
+webhooks to TYPO3. It also provides a corresponding backend module to manage
+webhook records in the TYPO3.
+
+Unfortunately this extension is not documented at the time of writing.
+
+.. _system-modules-scheduler:
+
+Scheduler (optional)
+====================
+
+This module is only available if the system extension
+:composer:`typo3/cms-scheduler` is installed.
+
+The Scheduler supports one-time or periodic execution of tasks that can be
+delivered by any extension. It has its own manual:
+:ref:`TYPO3 Scheduler <typo3/cms-scheduler:start>`.
+
+.. _system-modules-dbcheck:
+
+DB check (optional)
+===================
 
-.. include:: /Images/AutomaticScreenshots/Modules/DbCheckModule.rst.txt
+This module is only available if the system extension
+:composer:`typo3/cms-lowlevel` is installed.
+
+The *Database (DB) check* module offers functions related
+to the database and its content.
 
 Record Statistics
-  Shows a count of the various records in the database,
-  broken down by type for pages and content elements.
+    Shows a count of the various records in the database,
+    broken down by type for pages and content elements.
 
 Relations
-  Checks if certain relations are empty or broken, typically
-  used to check if files are being referenced.
+    Checks if certain relations are empty or broken, typically
+    used to check if files are being referenced.
 
 Search
-  A tool to search through the whole database. It offers an
-  advanced mode which is similar to a visual query builder.
+    A tool to search through the whole database. It offers an
+    advanced mode which is similar to a visual query builder.
 
 Check and update global reference index
-  TYPO3 CMS keeps a record of relations between all records.
-  This may get out of sync when certain operations are performed
-  without the strict context of the backend. It is therefore
-  useful to update this index regularly.
+    TYPO3 CMS keeps a record of relations between all records.
+    This may get out of sync when certain operations are performed
+    without the strict context of the backend. It is therefore
+    useful to update this index regularly.
 
+Some third party extensions offer similar but extended functionality around
+the database, for example :composer:`fixpunkt/backendtools` can be used during
+development to find all pages that contain a certain plugin or that use
+a certain backend layout etc.
 
-.. index:: Modules; Configuration
 .. _system-modules-configuration:
 
 Configuration
@@ -84,18 +120,30 @@ you can discover their function as you dig deeper into
 TYPO3 CMS. Let's just mention that the `$GLOBALS['TYPO3_CONF_VARS']`
 contains global configuration values.
 
-.. include:: /Images/AutomaticScreenshots/Modules/ConfigurationModule.rst.txt
-
-
-.. index:: Modules; Reports
 .. _system-modules-reports:
 
-Reports
-=======
+Reports (optional)
+==================
+
+This module is only available if the system extension
+:composer:`typo3/cms-reports` is installed.
 
-The *Reports* module contains information and diagnostic data
-about your TYPO3 CMS installation. It is recommended that you
+The :guilabel:`System > Reports` module contains information and diagnostic data
+about your TYPO3 installation. It is recommended that you
 regularly check the "Status Report" as it will inform you
 about configuration errors, security issues, etc.
 
-.. include:: /Images/AutomaticScreenshots/Modules/ReportsModule.rst.txt
+This module has its own dedicated manual:
+:ref:`TYPO3 Reports <typo3/cms-reports:start>`. It can be extended by third-party
+extensions. For example :composer:`apache-solr-for-typo3/solr` offers its own
+section in the report module.
+
+.. _system-modules-log:
+
+Log
+===
+
+The TYPO3 CMS backend logs a number of actions performed by backend users:
+login, cache clearing, database entries (creation, update, deletion),
+settings changes, file actions and errors. A number of filters are
+available to help filter this data.