Delboy
What I do is to put in the triplet of eighth notes, then put in a triplet of quarter notes, then follow with another triplet of eighth notes.
Then I draw in the beam on the quarter notes. But at least I've separated the triplets. You can of course the make any duplets you want using this method.
Be nice wouldn't it if Crescendo folk could use a different method of drawing in the beams? Especially if it were under the control of the person typing in the notes.
Derelboy