In the output select the Print Settings. In the menu select the button with 3 dots on it to add a logo, you can use a BMP, JPG or GIF file. Check the box above the logo on the position you want to use. The numbers accord to the left (1), middle (2) and right (3) of the page. You can also select if you want them on the top or bottom of the page.
It is also possible to add a logo with only text, for example, to have a disclaimer in the logos. For this use about a size of 850x115px.
