For example, Expense and Revenue are parent member cells under Account, such that Expense is set as expandable, while Revenue is not. Expense has Utilities and Rent as children, which are enabled in the form. Revenue has Salary and Commission as children, which are not enabled in the form. When you set cell styles and refresh the form, the Parent cell style is applied to Account and Expense but not to Revenue, since only expandable members and members with children enabled are considered as parents. As Revenue is at the lowest level, it is indicated with Child cell style. Now if you open it in ad hoc, both Expense and Revenue members are indicated with Parent cell styles, since both can be zoomed into to reveal their respective children.