[TASK] Explain details on Settings module (#5852)

* [TASK] Explain details on Settings module

Releases: main, 13.4, 12.4

* [TASK] Language checks

---------

Co-authored-by: Sarah McCarthy <sarahmccarthy123@yahoo.com>

Author: linawolf

Documentation/Administration/Tools/Settings/Index.rst

@@ -10,7 +10,120 @@ Settings (Admin Tools)
 Only available if :composer:`typo3/cms-install` is installed.
 
 The backend module :guilabel:`Admin Tools > Settings` offers tools
-to system maintainers regarding **global** settings that influence the complete
+to system maintainers regarding **global** settings that affect the complete
 TYPO3 installation.
 
-..  todo: Describe the tools available here
+..  _admin-tools-settings-extension:
+
+Extension configuration (global)
+================================
+
+Here you can set global extensions settings. Changes are stored in file
+:file:`config/system/settings.php` under the `EXTENSIONS` key. You can
+override extension settings in file :file:`config/system/additional.php`,
+using the :php:`$GLOBALS['TYPO3_CONF_VARS']['EXTENSION']` variable.
+
+Extensions can define global settings in
+`ext_conf_template.txt <https://docs.typo3.org/permalink/t3coreapi:extension-options>`_.
+
+..  _admin-tools-settings-password:
+
+Change install tool password
+============================
+
+You can use this tool to easily change the install tool password from
+within Admin Tools.
+
+..  _admin-tools-settings-maintainer:
+
+Manage system maintainers
+=========================
+
+This tool can be used to grant or revoke
+`system maintainer <https://docs.typo3.org/permalink/t3coreapi:system-maintainer>`_
+permissions from backend administrators.
+
+..  _admin-tools-settings-presets:
+
+Configuration presets
+=====================
+
+Some `system configuration settings <https://docs.typo3.org/permalink/t3coreapi:typo3ConfVars>`_
+(:php:`$GLOBALS['TYPO3_CONF_VARS']`) are commonly used in combination or with
+predefined values for certain use cases. Configuration presets can be used to
+configure these settings.
+
+..  _admin-tools-settings-cache:
+
+Cache settings
+--------------
+
+TYPO3 features a flexible `caching <https://docs.typo3.org/permalink/t3coreapi:caching>`_
+system with a default configuration that is ideal for most use cases.
+
+Depending on your individual hosting setup, the performance of your
+TYPO3 instance can be optimized even further by adjusting the storage type.
+
+..  _admin-tools-settings-debug:
+
+Debug settings
+--------------
+
+Depending on the `Application Context <https://docs.typo3.org/permalink/t3coreapi:application-context>`_
+debug settings are set to live (in Production context, no debugging) or debug (in
+Development context, debugging enabled). The debug setting presets turn
+debugging on and off with just two clicks.
+
+..  _admin-tools-settings-image:
+
+Image handling settings
+-----------------------
+
+These presets can be used to configure paths to Graphics Magick or Image Magick.
+
+More detailed settings are available in
+`TYPO3_CONF_VALS GFX - graphics configuration <https://docs.typo3.org/permalink/t3coreapi:typo3confvars-gfx>`_.
+
+..  _admin-tools-settings-mail:
+
+Mail handling settings
+----------------------
+
+This preset can be used to configure commands used to send mails.
+
+More detailed settings are available in
+`TYPO3_CONF_VALS MAIL settings <https://docs.typo3.org/permalink/t3coreapi:typo3confvars-mail>`_.
+
+..  _admin-tools-settings-password-hashing:
+
+Password hashing settings
+-------------------------
+
+Allows you to switch the `password hashing algorithm <https://docs.typo3.org/permalink/t3coreapi:password-hashing>`_.
+
+..  _admin-tools-settings-feature-toggles:
+
+Feature toggles
+===============
+
+..  figure:: /Images/ManualScreenshots/AdminTools/FeatureToggles.png
+    :alt: Feature toggles in the Admin Tools
+
+This tool enables and disables Core features. See
+`Feature toggle API <https://docs.typo3.org/permalink/t3coreapi:feature-toggles>`_
+for details.
+
+..  _admin-tools-settings-typo3confval:
+
+Configure installation-wide options
+===================================
+
+In this tool most values in the
+`TYPO3_CONF_VARS array in the settings.php <https://docs.typo3.org/permalink/t3coreapi:typo3confvars>`_
+can be changed.
+
+Values that have been overridden in file :file:`config/system/additional.php`
+are not displayed here.
+
+Some settings, for example `DB - Database connections <https://docs.typo3.org/permalink/t3coreapi:typo3confvars-db>`_,
+cannot be viewed or changed here for security reasons.

Documentation/ApiOverview/FeatureToggleApi/Index.rst

@@ -132,7 +132,8 @@ Enable / disable feature toggle
 Features can be toggled in the :guilabel:`Admin Tools > Settings` module via
 :guilabel:`Feature Toggles`:
 
-..  include:: /Images/AutomaticScreenshots/AdminTools/FeatureToggles.rst.txt
+..  figure:: /Images/ManualScreenshots/AdminTools/FeatureToggles.png
+    :alt: Feature toggles in the Admin Tools
 
 Internally, the changes are written to :file:`config/system/settings.php`: