Crystal Reports Enable Dialog Box Page Setup Button Runtime

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HI!!

I’m using crystalreportviewer in winform   c#.net  for show my reports.  I don´t know how enable a Dialog Box Page Setup
Button in Toolbar for in runtime time set the page size of the report. I can´t
find this options in Crystal Report Designer and Crystalreportviewer component.

I need provide this Dialog Box, because I don´t Know why the
default page size I set in crystal in design time change when I install the
software in the clients pcs.

Regards!!