[Port] [2022.3] DOCG-7278 Improve Position node docs

Author: markg-unity

Packages/com.unity.shadergraph/Documentation~/Position-Node.md

@@ -1,29 +1,21 @@
-# Position Node
+# Position node
 
-## Description
-
-Provides access to the mesh vertex's or fragment's **Position**, depending on the effective [Shader Stage](Shader-Stage.md) of the graph section that the [Node](Node.md) is part of. Use the **Space** drop-down parameter to select the coordinate space of the output value.
+The Position node returns the position of a vertex or fragment of a mesh.
 
 ## Ports
 
-| Name        | Direction           | Type  | Binding | Description |
+| **Name** | **Direction** | **Type** | **Binding** | **Description** |
 |:------------ |:-------------|:-----|:---|:---|
-| Out | Output      |    Vector 3 | None | **Position** for the Mesh Vertex/Fragment. |
-
-## Controls
-
-| Name        | Type           | Options  | Description |
-|:------------ |:-------------|:-----|:---|
-| Space | Dropdown | Object, View, World, Tangent, Absolute World | Selects the coordinate space of **Position** to output. |
-
-## World and Absolute World
-The Position Node provides drop-down options for both **World** and **Absolute World** space positions. The **Absolute World** option always returns the absolute world position of the object in the Scene for all Scriptable Render Pipelines. The **World** option returns the default world space of the selected Scriptable Render Pipeline.
-
-The [High Definition Render Pipeline](https://docs.unity3d.com/Packages/com.unity.render-pipelines.high-definition@latest/index.html) uses [Camera Relative](https://docs.unity3d.com/Packages/com.unity.render-pipelines.high-definition@latest?preview=1&subfolder=/manual/Camera-Relative-Rendering.html) as its default world space.
+| **Out** | Output | Vector 3 | None | Position of the vertex or fragment of the mesh, depending on the [shader stage](Shader-Stage.md) of the graph section. |
 
-The [Universal Render Pipeline](https://docs.unity3d.com/Packages/com.unity.render-pipelines.universal@latest/index.html) uses **Absolute World** as its default world space.
+## Space
 
-### Upgrading from previous versions
-If you use a Position Node in **World** space on a graph authored in Shader Graph version 6.7.0 or earlier, it automatically upgrades the selection to **Absolute World**. This ensures that the calculations on your graph remain accurate to your expectations, since the **World** output might change.
+The **Space** dropdown determines the coordinate space of the output position. 
 
-If you use a Position Node in **World** space in the High Definition Render Pipeline to manually calculate [Camera Relative](https://docs.unity3d.com/Packages/com.unity.render-pipelines.high-definition@latest?preview=1&subfolder=/manual/Camera-Relative-Rendering.html) world space, you can now change your node from **Absolute World** to **World**, which lets you use [Camera Relative](https://docs.unity3d.com/Packages/com.unity.render-pipelines.high-definition@latest?preview=1&subfolder=/manual/Camera-Relative-Rendering.html) world space out of the box.
+| **Options**   | **Description**  |
+|-|-|
+| **Object**  | Returns the vertex or fragment position relative to the origin of the object. | 
+| **View** | Returns the vertex or fragment position relative to the camera, in meters. |
+| **World**   | Returns the vertex or fragment position in the world, in meters. If you use the High Definition Render Pipeline (HDRP), **World** returns the position [relative to the camera](https://docs.unity3d.com/Packages/com.unity.render-pipelines.high-definition@latest?preview=1&subfolder=/manual/Camera-Relative-Rendering.html). |
+| **Tangent** | Returns the vertex or fragment position relative to the tangent of the surface, in meters. For more information, refer to [Normal maps](https://docs.unity3d.com/6000.3/Documentation/Manual/StandardShaderMaterialParameterNormalMapLanding.html). |
+| **Absolute World**| Returns the vertex or fragment position in the world, in meters. |