To allow users to analyze report balances by navigating to the underlying data, you must enable the "Drill Through" functionality in Financial Reporting Web Studio. This feature is configured in the properties of the data grid within the report design. Once enabled, users viewing the HTML version of the report can right-click on a data cell and select to drill through to more detailed information, such as the Detail Balances or Account Inspector pages within Oracle Fusion General Ledger, providing direct access to transactional data.

A. "Allow Expansion" is a different feature that lets users expand and collapse parent members within a dimension's hierarchy directly on the report grid.

B. While conceptually similar, the specific feature in Financial Reporting Web Studio is named "Drill Through" and is located in Grid Properties, not a general "Report Functions" area.

1. Oracle Fusion Cloud EPM, Designing with Financial Reporting Web Studio for Oracle Enterprise Performance Management Cloud, Chapter: Designing Grids, Section: "Setting Grid Properties". (Specifies that the "Drill Through" property enables drilling from a grid cell to a source page).

2. Oracle Fusion Cloud Financials Documentation, Using Financials for the U.S., Chapter: Financial Reporting and Analysis, Section: "Drill-Down from Reports to Live Data". (Explains that drill-through is the mechanism to navigate from a report balance to the Account Inspector).