Absolutely. To edit your mix, please select the "Edit Mix" option from the "Manage Mix" dropdown on the navigation bar. Once you do, you'll have the option of changing the percentage you allocate to each of the portfolios.
You have two options when editing your Mix:
1. The first option is to "Apply Changes to Future Trades." This means that the money you currently have invested will stay where it is, but any future trades will go to the new portfolios that you specify, in the new distribution %s.
2. The second option is to "Apply Changes to Current Mix and Future Trades." This means that the money you currently have invested will get re-distributed to the new distributions you specified, in addition to future trades.