Details of UMAP metric options

I'm trying to use your UMAP code as it was incorporated into the ImageJ plugin "Dimensionality Reduction." Specifically I am trying to run different metrics on my dataset. However I cannot find a concise list of the different metrics already encoded AND if they require arguments be passed as metric_kwds. The API reference and the readthedocs pages only list the names of metrics without any further details or arguments.

Is there a concise reference for the built-in metrics and is there a reference for which ones require arguments?

Thank you!