Q:

How to change the MySql server's parameters in AWS's RDS-MySql server

I run an RDS instance in AWS and have a MySql server installed there.  I want to change the parameters net_read_timeout and net_write_timeout to some bigger values from their respective default values. 
I tried using the parameter setting window in the RDS console -
RDS ->
Parameter groups -> default.mysql8.0

, but failing as below

What is the correct way to achieve this? 
Any pointer will be highly appreciated. 

A:

Do this:

Then select this parameter group while creating a new database or if you have a database already, modify it & change its parameter group to this one.