If you would like to include headers and footers when you print your Numbers spreadsheets in Numbers 3.2 and later, you can do this by editing them on the Print Setup screen. 
. Choose Print from the File menu. 
. You should see a preview of how the sheet will look when you print it. 
. To edit the headers for the sheet, click the top of any page and add the information you would like there.
Oct 17, 2008 - How do you resize a 'picture from file' that you insert in a Header? On the Design tab under Header & Footer Tools, click Format Picture.
To edit the footers, click the bottom of any page and add the information there. 
 You can use the Zoom menu to make it easier to edit header and footer content.
By default, page numbers are included in the center of the footer section. If you want to remove the page numbers, you can select one in the preview and delete it. Changes that you make to the header or footer of one page affect all pages for the sheet. However, the header and footer is separate for each sheet in your spreadsheet. Changes you make to your headers and footers are saved as part of the spreadsheet. If you want to exit the Print Setup screen without printing, click Done in the inspector.