When I use the supplied letter template all my typing starts offset to the right by 3.9″ (99mm). Why?
The address lines of the supplied letter template have a 3.9″ indent (which you will see on the ruler bar as one of the solid black triangles being moved over to that position). If you don’t want that indent then use Change Paragraph Format on the Style menu and change the 1st Line Indent value back to 0.