Hi there Johngs, welcome to the forums:)
I saw your post about the troubles you're having printing envelopes. Could you please let me know:
1. Which printer you are working with.
2. Your operating system.
3. The program you are printing them from and the size of envelopes you are trying to print on?
I will then look into seeing if the model of printer you have will support what you're trying to do.
How to find which Operating System you are running:
Which Windows Operating System am I running?
Mac OS X: How Do I Find Which Mac OS X Version Is on My Computer?
How to find your printers Model Number:
How Do I Find My Model Number?
Thank you,