Printing Labels or Envelopes for Contacts - Slipstick Systems You can use Word's Envelopes and Labels feature to print envelopes. Open Word. Switch to the Mailings tab. Click Envelopes to open the Envelopes and Labels dialog. Click the Address book icon. If this is the first time using this feature, select Insert Address to browse the Outlook Address Book for an address. Contacts you've previous ...