There are three things you can do with templates in this dialog.
One is to make a template
global (an Add-In) for your current Word session. That is the Add button. This makes no changes whatever in your current document.
The second is to Attach the template to your open document. This, again, makes no changes to your current document unless you check the box to update styles, in which case it will do that.
The third is to open the
Organizer which lets you copy macros or styles. (This is through the button at the bottom of the dialog box.
What is it you are trying to do using this dialog?
Charles Kenyon Madison, WI