Dear Sir,
Thank you for your reply. I get the file from the secretary of the
orginization I belong to, so It starts out as a membership list with
addresses. It is then saved as  a "catalogue" and then the mail merge process
is started, with a templete for the envelopes.
I will try your suggestions to see if they indeed do work with the way the
file is given to me for printing. There was an alternative way to print the
envelopes by using a full sheet of paper and modifying the margins, but I
think that will create a fault somewhere and a bigger mess.
It will be a few months before I do a printing again, but I will reply to
you in this forum if you like on how I make out in the next week.
Thank you for your assistance.