To select merge fields from the floating Merge Fields popup window
Use standard Windows selection controls:
When the Letter Merge Fields window is no longer required, click to close it.
To copy selected merge fields from the floating popup window into the template document
Copy fields from the Letter Merge Fields popup window into Word using the clipboard.
To filter the list of merge fields by group
EXACT has a long list of merge fields. For ease of use you can filter this list according to subset (group) by mens of a button at the bottom of the Letter Merge Fields window:
For example, these are just appointment related merge fields: