diff --git a/classes/class_classdb.rst b/classes/class_classdb.rst
index d222acbc9..59f3c7058 100644
--- a/classes/class_classdb.rst
+++ b/classes/class_classdb.rst
@@ -19,7 +19,9 @@ A class information repository.
 Description
 -----------
 
-Provides access to metadata stored for every available class.
+Provides access to metadata stored for every available engine class.
+
+\ **Note:** Script-defined classes with ``class_name`` are not part of **ClassDB**, so they will not return reflection data such as a method or property list. However, :ref:`GDExtension<class_GDExtension>`-defined classes *are* part of **ClassDB**, so they will return reflection data.
 
 .. rst-class:: classref-reftable-group
 
@@ -439,7 +441,9 @@ Sets ``property`` value of ``object`` to ``value``.
 
 :ref:`PackedStringArray<class_PackedStringArray>` **get_class_list**\ (\ ) |const| :ref:`🔗<class_ClassDB_method_get_class_list>`
 
-Returns the names of all the classes available.
+Returns the names of all engine classes available.
+
+\ **Note:** Script-defined classes with ``class_name`` are not included in this list. Use :ref:`ProjectSettings.get_global_class_list()<class_ProjectSettings_method_get_global_class_list>` to get a list of script-defined classes instead.
 
 .. rst-class:: classref-item-separator
 
@@ -451,7 +455,7 @@ Returns the names of all the classes available.
 
 :ref:`PackedStringArray<class_PackedStringArray>` **get_inheriters_from_class**\ (\ class\: :ref:`StringName<class_StringName>`\ ) |const| :ref:`🔗<class_ClassDB_method_get_inheriters_from_class>`
 
-Returns the names of all the classes that directly or indirectly inherit from ``class``.
+Returns the names of all engine classes that directly or indirectly inherit from ``class``.
 
 .. rst-class:: classref-item-separator
 
diff --git a/classes/class_projectsettings.rst b/classes/class_projectsettings.rst
index 75bad4063..47c17f535 100644
--- a/classes/class_projectsettings.rst
+++ b/classes/class_projectsettings.rst
@@ -3004,7 +3004,7 @@ When set to ``warn`` or ``error``, produces a warning or an error respectively w
 
 :ref:`int<class_int>` **debug/gdscript/warnings/inferred_declaration** = ``0`` :ref:`🔗<class_ProjectSettings_property_debug/gdscript/warnings/inferred_declaration>`
 
-When set to ``warn`` or ``error``, produces a warning or an error respectively when a variable, constant, or parameter has an implicitly inferred static type.
+When set to ``warn`` or ``error``, produces a warning or an error respectively when a variable, constant, or parameter has an implicitly inferred static type. In GDScript, type inference is performed by declaring a variable with ``:=`` instead of ``=`` and leaving out the type specifier. For example, ``var x := 1`` will *infer* the :ref:`int<class_int>` type, while ``var x: int = 1`` explicitly declares the variable as :ref:`int<class_int>`.
 
 \ **Note:** This warning is recommended *in addition* to :ref:`debug/gdscript/warnings/untyped_declaration<class_ProjectSettings_property_debug/gdscript/warnings/untyped_declaration>` if you want to always specify the type explicitly. Having ``INFERRED_DECLARATION`` warning level higher than ``UNTYPED_DECLARATION`` warning level makes little sense and is not recommended.
 
@@ -13515,7 +13515,7 @@ The ratio of :ref:`WorkerThreadPool<class_WorkerThreadPool>`'s threads that will
 
 :ref:`int<class_int>` **threading/worker_pool/max_threads** = ``-1`` :ref:`🔗<class_ProjectSettings_property_threading/worker_pool/max_threads>`
 
-Maximum number of threads to be used by :ref:`WorkerThreadPool<class_WorkerThreadPool>`. Value of ``0`` or less means ``1`` on Web, or a number of *logical* CPU cores available on other platforms (see :ref:`OS.get_processor_count()<class_OS_method_get_processor_count>`).
+Maximum number of threads to be used by :ref:`WorkerThreadPool<class_WorkerThreadPool>`. Value of ``-1`` means ``1`` on Web, or a number of *logical* CPU cores available on other platforms (see :ref:`OS.get_processor_count()<class_OS_method_get_processor_count>`).
 
 .. rst-class:: classref-item-separator
 
diff --git a/classes/class_sprite2d.rst b/classes/class_sprite2d.rst
index b1704ab61..507ebe78b 100644
--- a/classes/class_sprite2d.rst
+++ b/classes/class_sprite2d.rst
@@ -250,6 +250,8 @@ The texture's drawing offset.
 
 If ``true``, texture is cut from a larger atlas texture. See :ref:`region_rect<class_Sprite2D_property_region_rect>`.
 
+\ **Note:** When using a custom :ref:`Shader<class_Shader>` on a **Sprite2D**, the ``UV`` shader built-in will refer to the entire texture space. Use the ``REGION_RECT`` built-in to get the currently visible region defined in :ref:`region_rect<class_Sprite2D_property_region_rect>` instead. See :doc:`CanvasItem shaders <../tutorials/shaders/shader_reference/canvas_item_shader>` for details.
+
 .. rst-class:: classref-item-separator
 
 ----