Here's how to set up your group itinerary and create sub-trips:
Set up the group itinerary as a template.
Build your group itinerary like a regular trip, keeping in mind it's a template for sub-trips.
To create individual sub-trips:
Click 'Create sub-trip' in the group trip.
The group settings will auto-copy, but they can be adjusted if needed.
Customize each sub-trip as necessary. Remember, changes to the group itinerary won't update existing sub-trips.