Use Find and Replace
  You can find and replace all instances of a field, variable, or function with another field, variable, or function using the Find and Replace feature. You can use this feature in a: 
  
 - Trigger condition
 - Value calculation
 - Macro function body
 - Trigger setup window (for example, for entries in the DBPickList trigger and Patient Allergy trigger)
 
You can use IntelliSense lists to fill in the find and replace with entries.