How to add a wirebond group on APD15.7

Hi! I should be using a bondfinger and via ring on my wirebond lay-out. But I can't seem to do it because when I add a wirebond, the bondfinger is appearing as default and I can't change it to a via ring if ever I need to drop the stitch on the PWR/GND ring. So, I figured that I need to add a wirebond group in order to do this. But I don't know how to create a wirebond group on APD15.7.

Thanks for your help in advance. :)

Best regards,

Freeda