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?
ok, that's a start. But what do I do if I want to let the user decide between two or three options what to do next? That was very easy with the return value we had with the old buttons. And I could hide buttons depending on the current status of the document. All I can think of now is a choice field based on a second list and filtered accordingly. Possible, but way more complicated.