When building complex pages, you can optimize performance by populating a chain one control at a time instead of all the controls when the page initially loads. Selecting the Add 'No selection' option enables you to populate controls when necessary.
The page opens and the first control, for example Region, contains a Make Selection drop-down list. The other controls, after it, have no values.
When you make a selection in the first control, the next control, for example, State, will populate with selection values and the next control, City, has no values.
The next control, for example, City, will populate with selection values.
The report appears, as shown in the following image.