Printer keeps printing regular pages as envelopes

Hello.  My HP PhotoSmart all-in-one 2750 prints pages as envelopes instead of regular sheets of paper.  I did use the printer to print envelopes with greeting cards.  How do I set it up to print standard paper - and greeting cards and different size envelopes, too, but to use the standard page as the default setting?  Thank you.

Judy45432