There should be some mechanism in Studio to search in code, notes, or both for given text. At present, Find only searches code. I'm thinking maybe a drop-down next to the existing search / replace / match case buttons where you can choose Code, Notes or Code and Notes.
There probably also should be search scoping options for current editor, current class or module, current project, or entire solution. That sort of search scope is specifiable in other IDEs. I could probably live without the code / notes / both thing if I could just adjust the overall search scope, but ... if you know you're looking for something in notes ... being able to choose that is helpful.