1. Login to your Luminate CRM instance.
  2. Click on your name in the top right, and Click "Setup".
  3. On the left side bar find App Setup, and click Create.
  4. In the drop down click "Objects".
  5. Once on this page, click on the object you want to create a field within.
  6. Once done, find custom fields & relationships and click "new"
  7. Once that is done, follow the steps to create the new field to the setting you want.

You have now created a new object field, to be used within that object.