Mask an Object
Open your Studio project and select the mask icon from the toolbar.
The mask tool requires Chroma. Because of this, a message may appear instructing you to set the Chroma if you have not already done so.
Use the mask box to hide the player, referee, or other object you wish to hide. Adjust the corners of the mask box to the appropriate size.
Adjust the timeframe of the mask using the ends of the blue bar.