Passing parameters to multiple sub reports

Dear Experts,

I have a crystal report (version 11) that has 4 subreports. I need to pass the same list of parameters to each sub report from the main design. I can not find a global perameter. Is this possible. an example is the date range. I need the user to be able to run the report and put the date range in once and have it passed to all of the sub-reports. thank you for your time.