I'd like to use a GT title to scroll messages starting from the bottom and moving vertically. I can create a text object in GT Designer and set it to scroll with a delay and a duration. But what I'd really like is to set the rate/speed of the vertical movement. This is because the size of the message will change from show to show, so the duration will change if we want a constant rate of movement. Is there a way to set up the GT title so that the scrolling occurs at a fixed rate?