Notifications pop up on a black screen (white text) on standby, how to disable this?

Hi, I installed the official Korean 4.4.2 ROM for the e973. It works great, there are few buttons with Korean but they don't bother me.

I'm not sure if this 4.4.2 specific or is on all the ROMs (I don't remember).

But when the phone is on standby, and a, say, email comes in the screen stays black but there are notifications(white text) showing for a a second or two, anyone know how I can disable this. I've looked around Options and nothing yet.:crying:

Thanks.