Positioning the Consumers name and address to show properly through a window envelope can be a little tricky. There are 100s of window envelopes available to you and each are slightly different. Below is based on some experimentation with the standard #9 window envelope. You can use it as a starting point.
The merge code for Consumer's name should start on the 15th line from the top of the 1st Letter Format screen
should start in position 5 from the left of the 1st Letter Format screen
Keywords - Article Letters Article Print Letter merge codes