The AXIS COLUMNS keyword defines an axis for the columns of a visual shape for visual calculations.
Find more in Introducing VISUAL SHAPE for visual calculations in Power BI.
The following example shows an example of a visual shape definition in a DAX query.

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TABLE '__DS0VisualCalcs' = __DS0VisualCalcsInput     WITH VISUAL SHAPE     AXIS ROWS         GROUP [Brand]             TOTAL [IsGrandTotalRowTotal]         GROUP             [Category],             [Category_Code]             TOTAL [IsDM1Total]         GROUP [Color]             TOTAL [IsDM3Total]         ORDER BY             [Brand] ASC,             [Category_Code] ASC,             [Category] ASC,             [Color] ASC     AXIS COLUMNS         GROUP [Year]             TOTAL [IsGrandTotalColumnTotal]         GROUP             [Month],             [Month_Number]             TOTAL [IsDM6Total]         ORDER BY             [Year] ASC,             [Month_Number] ASC,             [Month] ASC     DENSIFY "IsDensifiedRow"

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