A parameter with release scope is defined. It is referred from some steps in a deployment. And then, needs to update the value to each steps despite of same value to the parameter.
How to update effectively?
Parameter with release scope is instanced to each steps. These values are independent each other even if same parameter name. If you want to set same value to these instances of parameter, Environment scope is applied for this requirement.
Environment parameter can be updated from [Environments] - [Parameter Configuration] menu on ROC.
The value will be affected to all referred parameters in deployment steps. So, you don't need to repeat updating in manifest file or on GUI.