Click the Mailings tab.
Click the Start Mail Merge button. Then click Step by Step Mail Merge Wizard.
The Mail Merge task pane opens.
Click the Envelopes option.
Then click Next: Starting document on the task pane to display Step 2 of 6.
Then click the Use the current document option.
Click Envelope Options.
Click the Envelope Options tab.
Select the envelope size and layout.
Click the Printing Options tab.
Select the printer, feed type, and tray for printing. Click OK.
Click Next: Select recipients on the task pane to display Step 3 of 6.
Click the Use an existing list option.
Then choose the same list to print the letters.
Click Next: Arrange your envelope on the task pane to display Step 4 of 6.
To include a return address on the mailing, type it now, position the insertion point,
click Address Block on the task pane to insert the merge field,
select your options, and then click OK.