Referring back to Figure 1, the Formula Bar is a contextual element. This means that the formula bar will appear only when creating new calculated columns, measures, and calculated tables.

This formula bar allows the user to enter Data Analysis Expressions (DAX) code in order to create these elements in relation to the data model. DAX is a formula language comprised of functions, operators, and values and is used in Analysis Services (Tabular), Power BI Desktop, and Power Pivot in Excel.