Merge branch 'master' of github.com:Unity-Technologies/FbxExporters into Unity-Technologies-master

Author: unitALG

com.unity.formats.fbx/Documentation~/images/FBXExporter_AutoUpdaterDisabled.png

@@ -34,7 +34,7 @@ The Unity Integration for Autodesk® 3ds Max® feature supports the following ve
 
 To install this package, follow the instructions in the [Package Manager documentation](https://docs.unity3d.com/Manual/upm-ui-install.html).
 
-Verify that the FBX Exporter is correctly installed by opening it (from the top menu: **GameObject** > **Export To FBX**).
+Verify that the FBX Exporter is correctly installed by opening it (from the top menu: **GameObject** > **Export To FBX...**).
 
 ### Updating from 1.3.0f1 or earlier
 

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@@ -10,3 +10,17 @@ You can convert the Model Prefab to an **FBX Linked Prefab**. This is a Prefab V
 
 For information on Model Prefabs in general and how to create FBX Linked Prefabs from FBX files, see [Working with FBX Linked Prefabs](#linked). If you are upgrading from a previous version of Unity, you can also [convert any existing](#conversion) Linked Prefabs you may have to the new FBX Linked Prefabs.
 
+
+## Terminology
+
+* __Model Prefab__: When you open an FBX file in Unity, the FBX Importer creates a Model Prefab. A Model Prefab is a read-only representation of the FBX contents, which updates when the FBX file is modified.
+
+* __Prefab Variant__: Prefab Variants are Prefabs which inherit all data from a base Prefab. Prefab Variants can create inheritance between ordinary Prefabs. For example, you can create a Variant of a button Prefab which has a different color but the same functionality. 
+
+* __Linked Prefab__: A Regular Prefab containing an FbxPrefab component which connects to an FBX file. 
+                 The Prefab updates automatically when the FBX file is modified. Components are maintained and if object names or hierarchies change in the FBX file,
+                 it is possible to remap the objects by name on import.
+                 This is specific to previous versions of the FBX exporter, and requires Unity 2018.2 or lower.
+
+* __FBX Linked Prefab__: A Prefab Variant with a Model Prefab as its base. This feature replaces Linked Prefabs in Unity 2018.3 and above.
+                     A special component is no longer required, as FBX Linked Prefabs use only the Unity Prefab features.