Toggle field codes missing in dynamics 365 document template

Hi,

We have uploaded some Document Templates for Dynamics 365 but we are unable to right click on the fields in the word document and select "toggle field codes".  We do this in mail merge to format dates correctly and remove blank address lines etc.

It is missing in Dynamics 365 Document Templates. Does anyone know how we can format the date coming out of CRM in a template like this?

Thanks,