Beam End User Parameter Not Showing Up?

i’m having trouble getting my beam-end to show up in the user parameters section. I tried following tutorials, and I followed all the steps. Still, it doesn’t seem to be showing up? is there something I am missing here? imgur links show screenshots of my issue.

I think it might be because you’re in an emitter, rather than a system.

I think you used to be able to have parameters in emitters, now apparently only in the system.