Replacing Parameters
You can extract parameters from a Crystal Report to replace the current parameters.
About this task
Procedure
- In the Select step, click the crystal report whose parameters should be changed.
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In the Edit step, click the appropriate button on the screen
toolbar:
Option Definition Preserve and Add 
Keeps fields for parameters that have been removed from the query. Preserve and Edit 
Does not keep fields for parameters that have been removed from the query. Clear Parameters 
Extracts parameters directly from the query.