After clicking the "Login" button from the home page, you'll be prompted to type in your Username and Password. Your Username is your account number and your password is the last four digits of your SSN.
You'll be prompted to choose an authentication image and challenge questions/answers. These are for your security.
Click the down arrow in the top right corner to toggle between your joint-accounts.
Click the menu button in the top right corner of the tile to transfer funds to or from the account.
By initiating a transfer, you can click the drop down to indicate which account you wish to transfer money to/from. Click the $ Amount field to type in the dollar amount of funds you wish to transfer.
Once you've entered the amount you wish to transfer, click Submit.
You'll see a Success message to acknowledge your transfer was successful.