Note Pro Line Spacing: how to decrease?..

Hello,
I try to use integrated Onyx reader with minimal Line Spacing settings ('0'), but the line spacing is too wide. Playing with different fonts, but it still wider I need.
I use Moon Reader Pro instead but it has its own things...
I tried lots of the different readers, the integrated one is one of the best (except spacing).

Any advice regarding line spacing for embedded reader?

I have Note Pro v.2.2.2

Thank you very much!