Printing invoice on letterhead

Good day house,
I want to my invoices on company letterhead. But I can no longer create margins to enable me print on the letterhead paper. Before now I preset the margin from Manager but now I can not. I guess this is due to manager version update. Can someone help pls.

There has never been a feature in Manager for directly setting margins. So I do not know what you are referring to. Margins are determined by a combination of coding in the theme used for display and your operating system’s printer driver. (Some printers cannot print all the way to the edge of the paper.)

If you want to adjust margins, you will need a custom theme. See and