A merge field can only be inserted into an email subject line or body only when you are ready to send an email, and have selected your recipients. When you select your merge field depending on what you choose, it will appear like this [[first name]] [[last name]].

1) Subject line merge fields - To add this please look directly above your blue subject line field you will see "Insert Merge Field in Subject:" select the drop down menu and choose your merge field, once you have made your selection now select the Insert icon.

2)Body merge fields - This can be added by selecting "Merge Field" from the text editing tools, please select the icon and then choose which merge field you would like in to include such as first name.