Totals and Combined Holdings
Each group shows you the total values of the portfolios and sub-group contained in the group.
This "Totals" view gives you a quick snapshot of the current status of the investments in this group.
In addition, the group's "combined" portfolio lets you see all of the individual investments of the portfolios and sub-groups together in one place.
The "combined" portfolio is a virtual, read-only portfolio that acts as just like a normal portfolio (with Prices and Fundamentals views), but has all of the group's individual holdings in it.
You can see asset allocation values and even create categories in the "combined" portfolio to get an accurate picture of your diversification within the group.