Plotting with different names

Hi, I have a question for you. I want to change the name of the variables on the IRFs in order to have written them in a more elegant way. I know that it is possible to do with these command:

title(‘Natural interest rate’);

Alternatively you can use this command: oo_.irfs, but it doesn’t work that way.
But I have find some problems: it doesn’t give me the same IRFs.
Someone can tell me why? Thank you!

Can you provide a code to replicate the issue?