the .RDL extention is showing on the report name.

I am using SSRS (SQL Server 2012) and am having trouble finding where I need to go to remove the .rdl extention from my report name in the Globals!ReportName variable. Changing the RDL file name as described in previous posts does not help. Any ideas on how I can get that extention removed from the name?

Globals!ReportName = "Report Name.rdl"

Thanks!