You can embed parameter attributes in email offer content. Parameter attributes are used to personalize content based on parameters passed to a queue activity, executing within a queue listener workflow. For more information on parameter attributes, please see the Attributes documentation. For more information on queue listeners and queue activities, please see the Interaction Designer documentation (which also covers execution of the same, and personalization of offer content based on parameter attributes in the same context).
Note that the Value/Trans toggle button is not displayed at parameter attributes at the email offer Preview.