a. New Merge Field Button: Clicking this button starts the process for creating a new merge field.
b. Custom Merge Field Info: each row contains data pertaining to an individual merge field. This information includes the Name, Description, Type (image or string), and the Value.
c. Edit Button: Click this button to edit the name and/or value of the merge field.
d. Delete: Click this button to remove the custom merge field completely.