space between systems

[Luca Danieli]

Hello all,

I am sorry for the question, but I have tried to solve this enigma by myself for almost 2 hours and now I give up.

The problem is that I would like to higher the space between systems and the various codes in the web reference didn't work.

Is there any good soul to explain me what code is right and where to put it?

(I am writing a piece for violin solo)

Thanks,

Luca