For example, an Admissions Manager can set this up in Application Forms.
  1. Navigate to onBoard.
  2. Select Settings > Applications.
  3. Click Edit to the right of your form.
  4. Click your Payment tab.
  5. Edit the Block Settings of the Payment Block.
  6. Select Yes for Electronic Funds Transfer.
  7. Save.
For Contracts:
  1. Navigate to onBoard.
  2. Select Settings > Contract Forms.
  3. Click Edit to the right of your form.
  4. Click your Payment/Deposit section.
  5. Select your Payment Gateway.
  6. Turn on Direct Debit.
  7. Save.
Another example is through Giving. As a Giving Manager:
  1. Navigate to onMessage. 
  2. Selecst Settings > Giving.
  3. Click Manage Giving Forms.
  4. Edit your Giving Form.
  5. Click the Field Display Properties.
  6. In the Payment section, check off Electronic Funds Transfer.
  7. Save.

There are other areas as well, but as the above directions state, you will just need to edit the payment area of each form or module that is accepting the payment.