The update option to perform parameter change with TCODE: RZ11 is not available by default.
Steps on how to re-activate the hidden edit option.
1) Execute TCODE: RZ11
2) The editable option for parameter change is not available
3) Enter "int" to enable the hidden edit button
4) The "edit" option appear for parameter change
5) Perform the changes and click save to update the new parameter value
