Fixed issue

Author: stevemunk

articles/azure-maps/drawing-package-guide.md

@@ -315,6 +315,13 @@ Defining text properties enables you to associate text entities that fall inside
 
 :::image type="content" source="./media/creator-indoor-maps/onboarding-tool/dwg-layers.png" alt-text="Screenshot showing the 'create a new manifest' screen of the onboarding tool.":::
 
+> [!IMPORTANT]
+> The following feature class should be defined (not case sensitive) in order to use [wayfinding]. `Wall` will be treated as an obstruction for a given path request. `Stair` and `Elevator` will be treated as level connectors to navigate across floors:
+>
+> 1. Wall
+> 2. Stair
+> 3. Elevator
+
 ### georeference
 
 Georeferencing is used to specify the exterior profile, location and rotation of the facility.