[Scribus] PDF form elements - tab order and radio behaviour

[William K. Volkman]

Hello,
        I am building some PDF forms in scribus 1.1.7 and I
can't figure out two things:

1. How to change the tab order between fields.

2. How to get checkboxes to exhibit radio behaviour, where
only one of a group of checkboxes can be in a selected state
at one time.

Any suggestions appreciated.

Thank you,
William.