Without reading the manual (and even when you do) the word "Trail" in the context of Eos effects is very easy to misunderstand. Almost everybody seems to understand this word as the trailing (comet effect) of an effect. "Trail" does however control how far apart instances of the effect are relative to each other. My request would be to replace the word "Trail" by the word "Distance" to clear things up.
If you do not want to do this, please make the manual clearer by adding visual examples.
