remove extra lines in crystal report in detail section

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C#3.0

C#

Windows

CrystalReports

i have windows application in which i am using crystal report. i use to have two sub-report in one crystal report.In my report,i am loading two sub reports In Report-Header section i am loading first sub-report and second in Report-Footer section.In my Detail section i am loading actual data.When number of records in detail section are more my Report-Footer goes to next page but problem is that my data in details section shows extra lines and spaces which i have used for formatting.i want to limit lines when records end on details section.