Acorn, thanks for your help and suggestions. But as you rightly said, PDF messes with line breaks and I fear this would be way more work and potential for error than doing it the cumbersome way and chosing Plain text all the time.

If it's not possible now, it's not possible at all to me.
I'd be very surprised if I would ever buy another piece of Xara software. Something really major would have to change there and since it did not happen in the last 25 years I am not holding my breath.