To automatically pay your DigitalChalk balance by adding a credit card on file to your account, follow these steps:

1. Log in to your DigitalChalk account, then click the Administration tab.
2. Click My Organization from the System Management menu, then click Plans from the displayed list.
3. The Subscriptions window is displayed. Under Payment Methods, click Add Card, and follow the instructions to provide your credit card information to add a credit card on file.