If you choose transition = crossfade you will lose "mouseover and mouseout" (left arrow, right arrow) in/out animation.
You would see what I mean if you click this link http://fotorama.io/examples/transition.html and Select Crossfade.
Is there way to enable that even you choose Crossfade? Thanks!
It seems fixed in the Fotorama 4.5.1.
Transitions are a little different from each other — arrows slide on slide transition, and fade on fade: