Thanks for pointing me toward the “Word Processor” preset since that is closer to what I’m looking for. But I’d still like to ask a few questions about it. I spent some time analyzing the settings after I applied the animation preset, and I’m starting to understand some of it (I think).
There is a “Slider Control” (an expression control effect) named “Type-On” that is used by the various expressions that drive this animation preset. I have determined that the slider value controls the “Offset (By Index)” values that reveal the source text as well as animate the “cursor” character. By adding one more character to my source text string than necessary, I can set the end keyframe for the Type-On property to the length of my text string minus one. That way the cursor remains and blinks after typing the desired text string as seen in the Gallery of text animation presets. My question is: