In Telerik Reporting, the export formats take predefined parameters called device information settings that are used to configure a rendering extension.
You can specify device information settings in a variety of ways. Firstly, you can specify application-wide settings using the <Telerik.Reporting> configuration section. For more information about specifying rendering parameters globally, see extensions Element.
Alternatively, you can specify device information settings per particular report as part of its definition, configuring the RuntimeSettings report property. Besides setting the export parameters for particular extension it allows hiding it and changing its description when listed to the end-user. The property in question can be set up from the report designer tools as well. In case of a report book document the settings of the first report in the book get respected.