I am trying to add a line feed to MTEXT.

The existing mtext looks like this: 10000

I want the resulting text to look like this: 10000
OEL CD

If I look at existing mtext that already has two lines the assoc 1 list is (1 . "10000\\POELCD").
However building the string in lisp with the "\\P" does nothing.

How can I accomplish this? I have been all over the web and found nothing that helps.