I'm not knowledgeable on this topic, but... In a coding tutorial that I am using, the instructor says to refactor using (CTRL+R)*2 I got the message 'no refactorings available.' All I was trying to do was change the name of a variable in all of its places where it was stated before.
I found out for what I was trying to do (CTRL+F2) works for 'refactoring'