This is not possible.
Okay, thanks for the info.
in older Acrobat versions this was possible. why not now? or, is there another Acrobat program that let one do this?
It was never possible, in any Acrobat version. You can use a script to achieve something similar to it, but it will always have issues. For example, you will lost one keystroke in the moment a field is filled in, before it goes to the next one.