Ah…….. with the correct value on the character index slider I can then adjust the repetition slider and the “a”s I need appear. However, it won’t animate if I keyframe the slider. The amount of “a”‘s changes when you are on the keyframe but doesn’t animate between keyframes.
Is there anyway to get it to animate so I can go from 1 “a” to many “a”s and adjust the speed curve so they start appearing slowly and speed up.