diff --git a/doc/classes/KinematicBody.xml b/doc/classes/KinematicBody.xml
index 0c66319ae73..17310ab4dc4 100644
--- a/doc/classes/KinematicBody.xml
+++ b/doc/classes/KinematicBody.xml
@@ -115,6 +115,8 @@
 			<argument index="6" name="floor_max_angle" type="float" default="0.785398">
 			</argument>
 			<description>
+				Moves the body while keeping it attached to slopes. Similar to [method move_and_slide].
+				As long as the [code]snap[/code] vector is in contact with the ground, the body will remain attached to the surface. This means you must disable snap in order to jump, for example. You can do this by setting[code]snap[/code] to[code](0, 0, 0)[/code] or by using [method move_and_slide] instead.
 			</description>
 		</method>
 		<method name="test_move">
diff --git a/doc/classes/PhysicsMaterial.xml b/doc/classes/PhysicsMaterial.xml
index bfebb472a55..3eebcc57a1d 100644
--- a/doc/classes/PhysicsMaterial.xml
+++ b/doc/classes/PhysicsMaterial.xml
@@ -1,8 +1,10 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <class name="PhysicsMaterial" inherits="Resource" category="Core" version="3.1">
 	<brief_description>
+		A material for physics properties.
 	</brief_description>
 	<description>
+		Provides a means of modifying the collision properties of a [PhysicsBody].
 	</description>
 	<tutorials>
 	</tutorials>
@@ -14,8 +16,10 @@
 		<member name="absorbent" type="bool" setter="set_absorbent" getter="is_absorbent">
 		</member>
 		<member name="bounce" type="float" setter="set_bounce" getter="get_bounce">
+			The body's bounciness. Default value: [code]0[/code].
 		</member>
 		<member name="friction" type="float" setter="set_friction" getter="get_friction">
+			The body's friction. Values range from [code]0[/code] (frictionless) to [code]1[/code] (maximum friction). Default value: [code]1[/code].
 		</member>
 		<member name="rough" type="bool" setter="set_rough" getter="is_rough">
 		</member>
diff --git a/doc/classes/Vector2.xml b/doc/classes/Vector2.xml
index 4bc18b926ed..a721ef50c55 100644
--- a/doc/classes/Vector2.xml
+++ b/doc/classes/Vector2.xml
@@ -109,7 +109,7 @@
 			<argument index="3" name="t" type="float">
 			</argument>
 			<description>
-				Cubicly interpolates between this vector and [code]b[/code] using [code]pre_a[/code] and [code]post_b[/code] as handles, and returns the result at position [code]t[/code]. [code]t[/code] is in the range of [code]0.0 - 1.0[/code], or a percentage of how far along the interpolation is.
+				Cubicly interpolates between this vector and [code]b[/code] using [code]pre_a[/code] and [code]post_b[/code] as handles, and returns the result at position [code]t[/code]. [code]t[/code] is in the range of [code]0.0 - 1.0[/code], representing the amount of interpolation.
 			</description>
 		</method>
 		<method name="distance_squared_to">
@@ -175,7 +175,7 @@
 			<argument index="1" name="t" type="float">
 			</argument>
 			<description>
-				Returns the result of the linear interpolation between this vector and [code]b[/code] by amount [code]t[/code]. [code]t[/code] is in the range of [code]0.0 - 1.0[/code], a percentage of how far along the interpolation is.
+				Returns the result of the linear interpolation between this vector and [code]b[/code] by amount [code]t[/code]. [code]t[/code] is in the range of [code]0.0 - 1.0[/code], representing the amount of interpolation.
 			</description>
 		</method>
 		<method name="normalized">
@@ -227,7 +227,7 @@
 			<argument index="1" name="t" type="float">
 			</argument>
 			<description>
-				Returns the result of SLERP between this vector and "b", by amount "t". "t" should be a float of 0.0-1.0, a percentage of how far along the interpolation is.
+				Returns the result of SLERP between this vector and [code]b[/code], by amount [code]t[/code]. [code]t[/code] is in the range of  [code]0.0 - 1.0[/code], representing the amount of interpolation.
 				Both vectors need to be normalized.
 			</description>
 		</method>
@@ -267,16 +267,22 @@
 	</members>
 	<constants>
 		<constant name="ZERO" value="Vector2( 0, 0 )">
+			Null vector.
 		</constant>
 		<constant name="INF" value="Vector2( inf, inf )">
+			Infinite vector.
 		</constant>
 		<constant name="LEFT" value="Vector2( -1, 0 )">
+			Left unit vector.
 		</constant>
 		<constant name="RIGHT" value="Vector2( 1, 0 )">
+			Right unit vector.
 		</constant>
 		<constant name="UP" value="Vector2( 0, -1 )">
+			Up unit vector.
 		</constant>
 		<constant name="DOWN" value="Vector2( 0, 1 )">
+			Down unit vector.
 		</constant>
 	</constants>
 </class>
diff --git a/doc/classes/Vector3.xml b/doc/classes/Vector3.xml
index b4dcc6c6aa4..4211c34d8e2 100644
--- a/doc/classes/Vector3.xml
+++ b/doc/classes/Vector3.xml
@@ -78,7 +78,7 @@
 			<argument index="3" name="t" type="float">
 			</argument>
 			<description>
-				Performs a cubic interpolation between vectors [code]pre_a[/code], [code]a[/code], [code]b[/code], [code]post_b[/code] ([code]a[/code] is current), by the given amount (t). (t) should be a float of 0.0-1.0, a percentage of how far along the interpolation is.
+				Performs a cubic interpolation between vectors [code]pre_a[/code], [code]a[/code], [code]b[/code], [code]post_b[/code] ([code]a[/code] is current), by the given amount [code]t[/code]. [code]t[/code] is in the range of [code]0.0 - 1.0[/code], representing the amount of interpolation.
 			</description>
 		</method>
 		<method name="distance_squared_to">
@@ -151,7 +151,7 @@
 			<argument index="1" name="t" type="float">
 			</argument>
 			<description>
-				Returns the result of the linear interpolation between this vector and [code]b[/code] by amount [code]t[/code]. [code]t[/code] is in the range of [code]0.0 - 1.0[/code], a percentage of how far along the interpolation is.
+				Returns the result of the linear interpolation between this vector and [code]b[/code] by amount [code]t[/code]. [code]t[/code] is in the range of [code]0.0 - 1.0[/code], representing the amount of interpolation..
 			</description>
 		</method>
 		<method name="max_axis">
@@ -228,7 +228,7 @@
 			<argument index="1" name="t" type="float">
 			</argument>
 			<description>
-				Returns the result of SLERP between this vector and "b", by amount "t". "t" should be a float of 0.0-1.0, a percentage of how far along the interpolation is.
+				Returns the result of SLERP between this vector and [code]b[/code], by amount [code]t[/code]. [code]t[/code] is in the range of [code]0.0 - 1.0[/code], representing the amount of interpolation.
 				Both vectors need to be normalized.
 			</description>
 		</method>
@@ -280,20 +280,28 @@
 			Enumerated value for the Z axis.
 		</constant>
 		<constant name="ZERO" value="Vector3( 0, 0, 0 )">
+			Null vector.
 		</constant>
 		<constant name="INF" value="Vector3( inf, inf, inf )">
+			Infinite vector.
 		</constant>
 		<constant name="LEFT" value="Vector3( -1, 0, 0 )">
+			Left unit vector.
 		</constant>
 		<constant name="RIGHT" value="Vector3( 1, 0, 0 )">
+			Right unit vector.
 		</constant>
 		<constant name="UP" value="Vector3( 0, 1, 0 )">
+			Up unit vector.
 		</constant>
 		<constant name="DOWN" value="Vector3( 0, -1, 0 )">
+			Down unit vector.
 		</constant>
 		<constant name="FORWARD" value="Vector3( 0, 0, -1 )">
+			Forward unit vector.
 		</constant>
 		<constant name="BACK" value="Vector3( 0, 0, 1 )">
+			Back unit vector.
 		</constant>
 	</constants>
 </class>
diff --git a/doc/classes/VideoStream.xml b/doc/classes/VideoStream.xml
index 6bfa48511bd..9f2655ed1bd 100644
--- a/doc/classes/VideoStream.xml
+++ b/doc/classes/VideoStream.xml
@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <class name="VideoStream" inherits="Resource" category="Core" version="3.1">
 	<brief_description>
+		Base resource for video streams.
 	</brief_description>
 	<description>
 	</description>
diff --git a/doc/classes/ViewportContainer.xml b/doc/classes/ViewportContainer.xml
index 8c60fb473da..dde429440d1 100644
--- a/doc/classes/ViewportContainer.xml
+++ b/doc/classes/ViewportContainer.xml
@@ -1,8 +1,10 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <class name="ViewportContainer" inherits="Container" category="Core" version="3.1">
 	<brief_description>
+		Control for holding [Viewport]s.
 	</brief_description>
 	<description>
+		A [Container] node that holds a [Viewport], automatically setting its size.
 	</description>
 	<tutorials>
 	</tutorials>
@@ -12,6 +14,7 @@
 	</methods>
 	<members>
 		<member name="stretch" type="bool" setter="set_stretch" getter="is_stretch_enabled">
+			If [code]true[/code] the viewport will be scaled to the control's size. Default value:[code]false[/code].
 		</member>
 		<member name="stretch_shrink" type="int" setter="set_stretch_shrink" getter="get_stretch_shrink">
 		</member>
diff --git a/doc/classes/WindowDialog.xml b/doc/classes/WindowDialog.xml
index 39487f5020b..f7f2d10fcd9 100644
--- a/doc/classes/WindowDialog.xml
+++ b/doc/classes/WindowDialog.xml
@@ -24,7 +24,7 @@
 			If [code]true[/code] the user can resize the window. Default value: [code]false[/code].
 		</member>
 		<member name="window_title" type="String" setter="set_title" getter="get_title">
-			The text displayed in the window's title bar. Default value: "Save a File".
+			The text displayed in the window's title bar.
 		</member>
 	</members>
 	<constants>