It is quite simple to print a mail merge document using Tray Selector. Set up your mail merge document in Word and preview it to ensure it is correct. You can use the back and forward buttons that look like this:

Word 2003:  Word 2007: 
 

Once you are sure your data is correct. At this point do not click any of the buttons (shown below):

Word 2003: Word 2007:

to merge the document to a new document printer or fax as you would normally do. Instead click your Tray Selector button. Tray Selector will automatically recognize that the document is a mail merge and display the dialog box shown below:

 

 

If you click ‘Yes’ then each merged letter of your document will be printed using your Tray Selector settings. Clicking ’No’ will just print the current document (i.e. unmerged) and clicking ‘Cancel’ will print nothing.

Notice that in mail merge mode, Tray Selector will print just one copy of your document, even if you have set a different number of copies to be printed, and it will not print any extra advanced copies.