1. Open the event in the mobile app
  2. Click on the Plus sign next to Event Registrants at the top left
  3. Enter the registrant's first and last name to search for them
  4. Click on their name in the search results to the right
  5. When prompted if you want to add them as a participant to this event say Yes
  6. Select the desired registration option by clicking the plus sign for that line item
  7. Select payment method and process payment or select pay later
  8. When prompted to Register participant say Yes
Note: While you cannot see the different registration units in the mobile event management app itself, they do get added to that participants record on the Event in the full version of Raiser's Edge