Actor marks in Flipside simulate marks on a stage, which are denoted as a T shape indicating where actors should stand for a given shot or scene.
Step 1. Press the menu button on either controller and choose Props from the main menu.
Step 2. Choose All Props then go to the Show Tools category.
Step 3. Find the Actor Mark prop in the show tools listings and click on it to add it to your set.
Step 4. Grab the actor mark and place it where you want an actor to stand on set.