Change the duration of the "Play Around"

[Sherex]

I don't know how to say in in English sorry...

I don't know if this is a new feature I just found it out weeks ago, and I'd love to be able to change the duration of this:

Thanks!

Title edited by mod for clarity

[Ann Bens]

No its not new, been there for many years.

Play around (shift+K)

You can change the duration in the Preferences/playback/preroll postroll