Set fix height of crystal report session detial

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CrystalReports

Hi All

I'm a developer using c#.net and crystal report and i have a problem with crystal report
session detail.
My question is
-I want to set fix height of session detail (note : no specific on the records
I found many solutions when i google they base on the records).
So difference from what I want.
Why I need to set fix size base on the pixel or so on... because my columns from database
can grow my columns store much of text so i need these columns can grow so i can set fix record to the report.

can anybody help me?

thank in advance.