@Zenock
Thanks for taking an interest in the HP Support Forums! After reading your post I see that your HP Envy 5660 printer is printing envelops in portrait instead of landscape. I would like to help you out with this issue today.
- Search Windows for wordpad, then select WordPad in the results.
- Click the menu icon
, then click Page Setup.
- In the Page Setup window, select your envelope type from the Size menu, select Landscape orientation, then click OK.
Click here and follow the document to perform above mentioned steps.
Let me know if that works.
Cheers.
Sandytechy20
I am an HP Employee