Select the cause_name what you want to group and click on Pin Sign as like below
Like this, you can group your cause items If you edit the group Go to dimensions cause items group --> edit group and change accordingly
Hope this helps kindly mark this answer as correct or helpful so that it will help others
Fantastic - such a simple solution! Thank you. Can I please ask a follow up question? Is it possible to have varying shades of green/blue/red according to the size of each cause within communicable / non-communicable / injury cause groups?