Transition effect speed – Fade

Hi,
is it possible to decrease the speed time of fading effect of the transition between one slide and the next in SLIDER OPTION, so it can be smooth.
I’ve read here https://xtemos.com/forums/topic/how-to-change-slide-transition-speed/ but this refers to slide duration (the time the slide stays before change), and I’m already using it.
Probably some setting in javascript code (millisecond..).

Thanks a lot.