title: how to make dynamic page header in crystal reports
body: <p>my problem is:</p>
  
  <p>the report force me to have a page header section which contains 4 fields. but the problem is one of this fields ( for example f1) should be hides in pages of first detail section and shows in some other detail sections.</p>
  
  <p>for example suppose first detail section(or sub report as I use in my project) needs d1 pages and second detail section ( or sub report as I use in my project ) needs d2 pages, for now:
  the p1 field should be hide in first d1 page headers and be shown in next d2 page headers</p>
  
  <p>the key point is to decide based on sections properties like names or ... but there is no such a parameter in crystal reports formula workshop</p>
  
  <p>how should I to solve this problem
  I'm working with crystal reports 13.</p>