position property
Use Selection placement (position) to define the video area in your output frame. The area outside of the rectangle that you specify here is black. If you specify a value here, it will override any value that you specify in the output setting Selection placement (position). If you specify a value here, this will override any AFD values in your input, even if you set Respond to AFD (RespondToAfd) to Respond (RESPOND). If you specify a value here, this will ignore anything that you specify for the setting Scaling Behavior (scalingBehavior).
Implementation
final Rectangle? position;