Particle Inital size not scaling

I’ve got a particle emitter emitting particles attached with a material that has a smoke atlas playing.
I’m trying to squash the particle sprite so its more oval and elongated. I can scale in X and that does it uniformly. but I can put Y and Z with a value of 0 and nothing changes. am I missing a setting?

Idk why the initial size works like it does, but there is a “scale” module which may work.

In the Required section of the emitter, change Screen Alignment from “PSA Square” to “PSA Rectangle”, then you’ll be able to scale non-uniformly.

I’m sure this answer is way too late for the original poster, hope it helps others!