Apple Motion 3 - Manual (Page 645)

Chapter 7 Using Text 645
A keyframe is added to the Path Offset parameter.
A positive value moves the text toward the right and a negative value moves the text
toward the left. You can enter values greater than 100% or less than 0% in the value
slider. A value greater than 100% moves the text completely off the path to the right; a
value less than 0% moves the text off the path to the left. In the following image, the
Path Offset is set to 105%, so the text is completely off the right end of the text path.
4 Go to the frame where you want to end the animation (or set the next keyframe).
5 Adjust the Path Offset slider or value slider to reposition the text on the path.
6 Play the project to see the text travel along the text path.
7 Disable Record.
This icon indicates that a
keyframe is present at
the current playhead
position.