diff --git a/docs-2.0/3.ngql-guide/10.tag-statements/3.alter-tag.md b/docs-2.0/3.ngql-guide/10.tag-statements/3.alter-tag.md
index bebd209025c..ba5d79eec2b 100644
--- a/docs-2.0/3.ngql-guide/10.tag-statements/3.alter-tag.md
+++ b/docs-2.0/3.ngql-guide/10.tag-statements/3.alter-tag.md
@@ -10,10 +10,6 @@
 
 - The property name must be unique in a tag. If you add a property with the same name as an existing property or a dropped property, the operation fails.
 
-- Only the length of a `FIXED_STRING` or an `INT` can be increased. The length of a `STRING` or an `INT` cannot be decreased.
-
-- Only the data type conversions from FIXED_STRING to STRING and from FLOAT to DOUBLE are allowed.
-
 
 ## Syntax
 
@@ -38,6 +34,12 @@ ttl_definition:
 
 - When a property value is set to `NOT NULL` using `ADD` or `CHANGE`, a default value must be specified for the property, that is, the value of `DEFAULT` must be specified.
 
+- When using `CHANGE` to modify the data type of a property:
+  
+  - Only the length of a `FIXED_STRING` or an `INT` can be increased. The length of a `STRING` or an `INT` cannot be decreased.
+
+  - Only the data type conversions from FIXED_STRING to STRING and from FLOAT to DOUBLE are allowed.
+
 ## Examples
 
 ```ngql