I have finished my first play script ( for acting out on stages and such.), some time ago and have decided to include a character that narrates at the beginning (he is however not yet introduced officially as a character on stage, at that time period.), he introduces all of the eminent characters in my play and I was wondering would this be acceptable in terms of a drama play? I also need advice, as to how often voice-overs should be used in both movies and drama plays, as well as how long they should be, when used. I am deciding on commencing writing with drama scripts first and then will move on to movie scripts, in order to get the gist of the basics, but I still have a long way to go, so I would appreciate any help.