help with running title in the right up of the pdf page

[Gian Maria Niccolò Benucci]

Hi all,

I am working with ClassicThesis style. There is a way to eliminate or
modify the running title of the chapter that LyX plot in the pdf (top of
right pages)?
I need to shorten it and change some text, but how can I?
Thanks a lot for helping...

Gian