To change the offer or treatment code format in an existing offer template
You define the offer and treatment code formats for each offer template you create. You set the offer or treatment code formats at the time that you create each offer template. You can also change the offer and treatment code formats for existing offer templates by editing the template, but only if the template has not yet been used to create offers.
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1.
Log in to Campaign and click Settings > Campaign Settings.
2.
On the Campaign Settings page, click Offer Template Definitions.
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5.
Click Finish.