By default, the Visible property is False, which indicates that the category-axis is visible by default. If Visible property is False, the line, ticks, labels and title of the category-axis are hiden. The grid lines defined by ChartGridLines and OverviewGridLines properties are not hidden by design. You can use the Width property on 0 to hide the grid lines defined by ChartGridLines and OverviewGridLines properties

For instance:

• false, hides the category-axis