diff --git a/docs/add-new-resource-long.md b/docs/add-new-resource-long.md
index 03f2b6a9..6a8e1c04 100644
--- a/docs/add-new-resource-long.md
+++ b/docs/add-new-resource-long.md
@@ -257,7 +257,10 @@ You can always check resource configurations of existing jet Providers as
 further examples under `config/<group>/config.go` in their repositories.
 
 _Please see [this figure] to understand why we really need 3 different
-functions to configure external names and, it visualizes which is used how._
+functions to configure external names and, it visualizes which is used how:_
+![Alt text](./images/upjet-externalname.png)
+_Note that, initially, GetIDFn will use the external-name annotation to set the terraform.tfstate id and, after that, it uses the terraform.tfstate id to update the external-name annotation. For cases where both values are different, both GetIDFn and GetExternalNameFn must be set in order to have the correct configuration._
+
 
 ### Cross Resource Referencing