Screen between layouts went grey

When I run Xibo with multiply layouts, the screen went first grey, then the layout appeared, when the next layout should be therem first there is a grey screen, then the layout is there. Can I remove that or put it in black?

Anything that you see between layouts is most likely the layout’s background ie if you’d change the background to black then it should be black flash between layouts.

the background from all the layouts has been black. so i don’t know why xibo does this