Keyframes allow you adjust the position and size of your captions throughout your project.
To add a keyframe:
Tap Keyframes.
Adjust the timeline where you'd like to add a keyframe.
Drag the caption to the desired location. You can also adjust the size of the captions by pinching with two fingers.
Choose your animation curve.
Tap Apply
Don't see it?
You must be on version 10.74 or newer.