Update Project Settings page

- Add screenshots
- Document reading and writing settings
- Document manually editing project.godot
- Note that most settings are changed in different
classes at runtime

tutorials/editor/project_settings.rst

@@ -1,16 +1,138 @@
-:article_outdated: True
-
 .. _doc_project_settings:
 
 Project Settings
 ================
 
-This page explains how to use the Project Settings window. If you would like to access and modify project settings via code, see :ref:`ProjectSettings <class_ProjectSettings>`.
+There are dozens of settings you can change to control a project's execution,
+including physics, rendering, and windowing settings. These settings can be
+changed from the **Project Settings** window, from code, or by manually editing
+the ``project.godot`` file. You can see a full list of settings in the 
+:ref:`ProjectSettings <class_ProjectSettings>` class.
+
+Internally, Godot stores the settings for a project in a ``project.godot`` file,
+a plain text file in INI format. While this is human-readable and version control
+friendly, it's not the most convenient to edit. For that reason, the
+**Project Settings** window is available to edit these settings. To open the
+Project Settings, select **Project > Project Settings** from the main menu.
+
+.. figure:: img/project_settings_basic.webp
+    :align: center
+
+    The Project Settings window
+
+The **Project Settings** window is mainly used to change settings in the
+**General** tab. Additionally, there are tabs for the
+:ref:`Input Map <doc_input_examples_input_map>`,
+:ref:`Localization <doc_internationalizing_games>`,
+:ref:`Globals <doc_singletons_autoload>`,
+:ref:`Plugins <doc_installing_plugins_enabling_a_plugin>`, and
+**Import Defaults**. Usage of these other tabs is documented elsewhere.
+
+Changing project settings
+-------------------------
+
+The **General** tab of the project settings window works much like the inspector.
+It displays a list of project settings which you can change, just like inspector
+properties. There is a list of categories on the left, which you can use to select
+related groups of settings. You can also search for a specific setting with the
+**Filter Settings** field.
+
+Each setting has a default value. Settings can be reset to their default values
+by clicking the circular arrow **Reset** button next to each property.
+
+Changing project settings from code
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+You can use :ref:`set_setting() <class_ProjectSettings_method_set_setting>` to
+change a setting's value from code:
+
+.. tabs::
+    .. code-tab:: gdscript GDScript
+        
+        ProjectSettings.set_setting("application/run/max_fps", 60)
+        ProjectSettings.set_setting("display/window/size/mode", DisplayServer.WINDOW_MODE_WINDOWED)
+
+    .. code-tab:: csharp
+
+        ProjectSettings.SetSetting("application/run/max_fps", 60);
+        ProjectSettings.SetSetting("display/window/size/mode", (int)DisplayServer.WindowMode.Windowed);
+
+However, many project settings are only read once when the game starts. After
+that, changing the setting with ``set_setting()`` will have no effect. Instead, 
+most settings have a corresponding property or method on a runtime class like
+:ref:`Engine <class_Engine>` or :ref:`DisplayServer <class_DisplayServer>`:
+
+.. tabs::
+    .. code-tab:: gdscript GDScript
+        
+        Engine.max_fps = 60
+        DisplayServer.window_set_mode(DisplayServer.WINDOW_MODE_WINDOWED)
+
+    .. code-tab:: csharp
+
+        Engine.MaxFps = 60;
+        DisplayServer.WindowSetMode(DisplayServer.WindowMode.Windowed);
+
+In general, project settings are duplicated at runtime in the
+:ref:`Engine <class_Engine>`, :ref:`PhysicsServer2D <class_PhysicsServer2D>`,
+:ref:`PhysicsServer3D <class_PhysicsServer3D>`,
+:ref:`RenderingServer <class_RenderingServer>`, 
+:ref:`Viewport <class_Viewport>`, or :ref:`Window <class_Window>` classes. In the
+:ref:`ProjectSettings <class_ProjectSettings>` class reference, settings
+links to their equivalent runtime property or method.
+
+Reading project settings
+------------------------
+
+You can read project settings with
+:ref:`get_setting() <class_ProjectSettings_method_get_setting>` or
+:ref:`get_setting_with_override() <class_ProjectSettings_method_get_setting_with_override>`:
+
+.. tabs::
+    .. code-tab:: gdscript GDScript
+        
+        var max_fps = ProjectSettings.get_setting("application/run/max_fps")
+        var window_mode = ProjectSettings.get_setting("display/window/size/mode")
+
+    .. code-tab:: csharp
+
+        int maxFps = (int)ProjectSettings.GetSetting("application/run/max_fps");
+        var windowMode = (DisplayServer.WindowMode)(int)ProjectSettings.GetSetting("display/window/size/mode");
+
+Since many project settings are only read once at startup, the value in the
+project settings may no longer be accurate. In these cases, it's better to read
+the value from the runtime equivalent property or method:
+
+.. tabs::
+    .. code-tab:: gdscript GDScript
+        
+        var max_fps = Engine.max_fps
+        var window_mode = DisplayServer.window_get_mode()
+
+    .. code-tab:: csharp
+
+        int maxFps = Engine.MaxFps;
+        DisplayServer.WindowMode windowMode = DisplayServer.WindowGetMode();
+
+Manually editing project.godot
+------------------------------
+
+You can open the ``project.godot`` file using a text editor and manually
+change project settings. Note that if the ``project.godot`` file does not have a
+stored value for a particular setting, it is implicitly the default value of
+that setting. This means that if you are are manually editing the file, you may
+have to write in both the setting name *and* the value.
+
+In general, it is recommended to use the Project Settings window rather than
+manually edit ``project.godot``.
 
-Godot stores the project settings in a project.godot file, a plain text file in INI format. There are dozens of settings you can change to control a project's execution. To simplify this process, Godot provides a project settings dialog, which acts as a front-end to editing a project.godot file.
+Advanced project settings
+-------------------------
 
-To access that dialog, select Project -> Project Settings.
+.. figure:: img/project_settings_advanced.webp
+    :align: center
 
-Once the window opens, let's select a main scene. Locate the `Application/Run/Main Scene` property and click on it to select 'hello.tscn'.
+    The advanced project settings
 
-The project settings dialog provides a lot of options that can be saved to a project.godot file and shows their default values. If you change a value, a tick appears to the left of its name. This means that the property will be saved in the project.godot file and remembered.
+By default, only some project settings are shown. To see all the project
+settings, enable the **Advanced Settings** toggle.

tutorials/inputs/input_examples.rst

@@ -149,6 +149,8 @@ avoid this, make sure to test the event type first:
         }
     }
 
+.. _doc_input_examples_input_map:
+
 InputMap
 --------
 

tutorials/plugins/editor/installing_plugins.rst

@@ -53,6 +53,8 @@ plugin's ``addons/`` folder into your project folder to merge the new folder
 contents with the existing one. Your file manager may ask you whether to write
 into the folder; answer **Yes**. No files will be overwritten in the process.
 
+.. _doc_installing_plugins_enabling_a_plugin:
+
 Enabling a plugin
 ~~~~~~~~~~~~~~~~~