Report Preview
The report preview settings view enables Report Server customers to modify Telerik Report Viewer options in Preview view.
Parameters Area options
The parameters area section allows you to set single and multi-select report parameters' editor type. The available values for both are ListView and ComboBox. The ListView is the default option. It represents a Kendo UI ListView widget.
The ComboBox has two different representations of the Telerik Report Viewer for both editors:
Single select editor - it is rendered as a Kendo UI ComboBox widget.
Multi-select editor - it is rendered as a Kendo UI MultiSelect widget
Page Area options
The page area section allows you to upload an image that will be used as a background image in the Telerik Report Viewer Page area. The image should be in PNG, GIF, or JPG file format. It is used only when the parameter values are missing or invalid.