There seems to be no way to add more buttons to forms in the new designer. I used these a lot in the classic designer to forward forms from one department to another. We have a lot of lists that collect information from different departments, and so far I used buttons connected to a status field that I used in workflow to decide what to do next.
In the new designer, I can't even distinguish between save and submit. So what do I do if I started to fill out a form, but am not ready yet to send it off?