Can I create an icon in Apple Mail to Train as Spam?

I have started using SpamSieve again after a hiatus, and had gotten used to the ability to click on the Junk icon in the Toolbar. It would be nice to have a Train as Spam icon in the Toolbar to replace that. Does anyone know of a way to create that in Apple Mail?

Thanks,
Marcia

That’s not currently possible, but it’s a feature I would like to add.