If the report is printed directly from a Report Designer's preview, you have option to manually change the page settings of the document. This will allow you to set manually paper size gathering the whole content.
If reports are only designed in the Standalone Report Designer, and then are printed from code. the TRDX file's content can be deserialized into a Telerik.Reporting.Report object
, which allows you to change the report's PageSettings properties in code.
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