Aleatoric boxes

Is there an easy and efficient way to make aleatoric boxes in Dorico Pro 5? I’ve tried many of the workarounds and I just can’t seem to make them work…

Did you follow the steps explained in this video? They work pretty well for me:

Robin,
Thanks for that solution; it works pretty well! Is there a way I can adjust the height of the box as well as the width?

Robin,
Sorry for the repeated questions, but do you put the box in first and then put the notes in or do you put the notes first and then enclose with the box?