You want the Timezone field to be pre-populated when the location record is changed in...

To pre-populate the Timezone field when the location record is changed in Job Information, you need to configure the association as follows:

Base Object:Job Information

Trigger Event: Assigned to theLocationfield with the event set toonChange.This configuration ensures that whenever the Location field is updated in Job Information, the system triggers the logic to update and pre-populate the Timezone field based on the associated Location. The onChange event drives this functionality.