Conditional Row Suppression allows the user to hide rows of data that meet a predefined condition. This might be useful when certain fields do not apply to all records.
The below example displays contact information for company employees residing in the UK and USA. The Employees.Region field stores State values for USA residents and null value for UK residents.
When building an Employee Directory report, the formula below might be used for the “Address” column to joining together each individual component of the employee’s address.
={Employees.Address} & ", " & {Employees.City} & ", " & {Employees.Region} & ", " & {Employees.PostalCode}
Here’s how this data is returned without the use of row suppression. Note that Employees.Region doesn’t return any information for Buchanan, Steven or Dodsworth, Anne but is necessary to show the State for Callahan, Laura and Fuller, Andrew.

Conditional Row Suppression can be used in conjunction with another detail row to format the Address column on the report as appropriate for each employee’s country of residence.
{Employees.Region} with {Employees.Country}.
icon on the toolbar.
Add button at the bottom of the dialog to add a new condition.
icon to open the Formula Editor and enter this formula: Not({Employees.Country} = "USA")
{Employees.Country} = "USA"
Now, whenever the employee’s country is not the USA, the first row will be hidden and the second will be displayed. When the employee’s country is the USA, the second row is hidden and the first one will be used. When this report is executed or reported, the output will now look this, with the correct fields:

Notice for the employees living in the UK, the name of the country replaces a null value. For employees living in the USA, their state of residence appears.