If you want to really show off, you can use a clear glass plate on a stand and stand with it between you and the camera. A la Beautiful Mind. And most every oth

If you want to really show off, you can use a clear glass plate on a stand and stand with it between you and the camera. A la Beautiful Mind. And most every other recent Hollywood production. You just have to mirror the camera feed so that what you write doesn't show up reversed.