Use b3DDrawMode in Cascade to Visualize Text Placement

Use a ParticleTextParamComponent to override the parameters set in Cascade

The ParticleTextParamComponent must be attached to the ParticleSystem you wish to modify

The details panel for a ParticleTextParamComponent will let you modify all Text Particle modules within the attached ParticleSystem

(Optional) Right-click anywhere in the empty space of your emitter and choose TypeData -> New GPU Sprites.
This will greatly increase the max number of particles you can use, but the drawback is that you cannot use any of the "Shuffle" abilities of the ParticleTextParamComponent.

To change text properties at runtime, get a reference to the Particle Text Param Component, and call any of the SetParam functions