How to turn this off?

RogueVader Blade style
SSJ Blade Style

When I switch to my RogueVader and SSJ font, there’s a glowing light that automatically shows up. What is this called and how can I remove it?

You have this option enabled, since you’re using the library just don’t select this under Emitter Effects (see the style description at the top of the style code).

  1. Emitter Off Effect: Base Color Pulse (One-Time Preset Indicator)