where I can add argument ?

hi hi, I want to add argument to NMKD Platform, becaue I'm getting a error:` Warning: Your image appears to be completely black. This could be an issue with the model, VAE, sampler, or precision settings.`

I want to add `--no-half ` or `--xformers` to fix it, but I don't know where is the main file if is exist even.