What'S the proper way to caption negative prompt in filewords?

[ARandomUserFromGithub]

I'm not too sure how to get the negative prompt through besides txt2img which only generates previews.
I tried to follow the same pattern than with generation parameters txt fiels coming along generated images:

prompt text
Negative prompt: prompt text

I'm not sure if the negative prompt is getting through or not.

As there's a checkbox saying "positive filewords only", I assume there's such a thing as negative filewords. So I try to tinker around but there's not any information online about that subject.

[WASasquatch]

I'm not positive, but I think it's similar to diffusion. Say you got little fish floating around a person with the absence of water, they may come out as birds, so you could negative weight "flying birds" in this particular image to ensure the "fish" aspect remains true.

[ARandomUserFromGithub]

Tho can it read negative prompt from the positive filewords? Not sure how to train negative during positive training.