Apple Motion 4 - Manual (Page 855)

The upper area of the Sequence Text controls contains the Add and Remove pop-up
menus, which are used to select the text parameters to be sequenced, or to remove
parameters once they have been added. The second group of parameters are the sequence
Controls, which include options for setting the direction and speed of the animation,
whether the animation is applied per character, per word, per text layer, and so on.
In this simple example, Opacity, Scale, and Glow scale are sequenced.
855 Chapter 14 Animating Text