Add New Parameter to Module
To add a new parameter to a module, place the editor cursor on the module name, Right+Click and select Refactor > Add parameter.
In the Add parameter wizard you can tune the name, type, width and the value of the new parameter.

Click Ok to perform the refactoring or Preview to see the changes that are about to be performed in the source code.

Note
An empty parameter override is added to all the instances of the selected module along with a FIXME comment which shows up in the Tasks View. See Track Tasks using TODO Markers.
Tip
In the Preview page you can select what changes should be performed.