add note for matching params to drop() function

content/v2.0/reference/flux/functions/built-in/transformations/drop.md

@@ -28,13 +28,19 @@ drop(fn: (column) => column =~ /usage*/)
 
 ## Parameters
 
+{{% note %}}
+Make sure `fn` parameter names match each specified parameter. To learn why, see [Match parameter names](/v2.0/reference/flux/language/data-model/#match-parameter-names).
+{{% /note %}}
+
 ### columns
+
 Columns to be removed from the table.
 Cannot be used with `fn`.
 
 _**Data type:** Array of strings_
 
 ### fn
+
 A predicate function which takes a column name as a parameter (`column`) and returns
 a boolean indicating whether or not the column should be removed from the table.
 Cannot be used with `columns`.
@@ -44,6 +50,7 @@ _**Data type:** Function_
 ## Examples
 
 ##### Drop a list of columns
+
 ```js
 from(bucket: "example-bucket")
 	|> range(start: -5m)
@@ -51,6 +58,7 @@ from(bucket: "example-bucket")
 ```
 
 ##### Drop columns matching a predicate
+
 ```js
 from(bucket: "example-bucket")
   |> range(start: -5m)
@@ -60,4 +68,5 @@ from(bucket: "example-bucket")
 <hr style="margin-top:4rem"/>
 
 ##### Related InfluxQL functions and statements:
+
 [DROP MEASUREMENT](https://docs.influxdata.com/influxdb/latest/query_language/database_management/#delete-measurements-with-drop-measurement)