Printing custom size envelope
Hello. I'm sorry if this is the wrong forum for this question, but I don't know where else to put it. I am not getting any response on the HP forum. Here's my question and maybe someone here can help.
I have created a custom envelope size on my computer (8.75x5.75). It's the size of a greeting card, or a regular piece of paper folded in half. It's called envelope A9 in online lists of envelope sizes, but is not included in the list of paper sizes available on my HP Office Jet Pro 9019 printer. I've looked all over the HP website and followed the instructions to create a custom paper size and it shows up in the list on my computer but not in the list of paper/envelope sizes on the printer. When I set the printer to custom size, it doesn't recognize the size from my computer and instead prints like a #10 envelope. Is there a way to either add the size to the printer, or to get the printer to recognize the size coming from my computer? If this question should be on another forum, please let me know. Thanks very much for any help.
iMac Pro