In a radio script, what is usually written in Italics?

Question: In a radio script, what is usually written in Italics!?

10 pts for the right answer!.!.!.is it the introduction, the instructions for staging the play!?Www@QuestionHome@Com

Best Answer - Chosen by Asker:

in a normal script, the stage direction and choreography that the script writer had in mind is in Italic!. also, any notes that they put about sound affects, lighting, background noise etc!.!.!. pretty much just any extra notes other than lines are put in ItalicsWww@QuestionHome@Com

well a radio script doesnt have any staging!.!.!.it's on the radio!.
so it would have to be the introduction lolWww@QuestionHome@Com