Hi Joseph,
thank you for your message and for the link!
My friend actually found out a way to do this in Edge Animate. By editing the clip (the size of the box where text is) you can achieve this effect easily. Just make the box widen as fast as you want the imaginary person to write and the text will appear on the screen as wanted. The clip-section can be found in the down left corner of the screen.
All the best! 🙂
Regards,
Katri