Tablix Properties Dialog Box, Visibility
Select Visibility on the Tablix Properties dialog box to specify visibility options for the data region.
Select an option to indicate how the report item is displayed in the report initially.
Select this option to show the report item.
Select this option to hide the report item.
Select this option to vary the initial visibility using an expression.
Type an expression that evaluates to a Boolean value of True to hide the item and False to show the item. Click the Expression (fx) button to edit the expression.
Choose this option to display a toggle image that enables the user to show or hide this report item in an HTML report viewer.
Type or select the name of a text box in the report in which to display a toggle image; for example, Textbox1. The text box that you choose must be in the current or containing scope for this report item. For example, to toggle visibility of rows associated with a child group, select a text box in a row associated with the parent group. To toggle visibility of a chart, select a text box that is in the same containing scope as the chart; for example, the report body or a rectangle.