You can perform internal transfers in the Client Portal, provided that the transfer is between accounts with the same currency or between USD and Cents accounts.
Please login to Client Portal. Select "Transfer Between Accounts" under "Funds" in the left menu.
Next, please select the accounts to transfer funds from and to, and enter the corresponding amount, then click "Submit." If you wish to transfer from a USD account to a Cents account (or vice versa), the process is the same as described above.