When enabling pre-built business processes like Financials or Capital, you don't create custom dimensions from scratch. Instead, the framework provides a set of placeholder dimensions (e.g., Custom1, Custom2). To use them, you navigate to the configuration task for the business process (e.g., Configure: Financials), and within the Map/Rename Dimensions section, you enable and rename these placeholders to fit your specific business needs. This process maps the generic custom dimension to your business-specific requirement.