Custom Fields allow users to add additional, user-defined data points to various modules in CustomBooks™, such as Companies, Sales Invoices, Items, Purchase Orders, etc. These fields can store information that isn’t part of the default setup.
For example, an e-commerce business might use a custom field to track order source (e.g., "Website" or "Mobile App"), while a service-based company might use it to note project deadlines or client preferences.