Numbers for macOS offers sophisticated options for printing spreadsheets, charts, and other items created in the numerically minded app. In producing this output, you might want to remove page numbers or customize a header or footer with additional detail. Peruse all of the options in Numbers’s menus and inspectors, and you find nothing. Where has Apple hidden it?
In the Print dialog, of course! I don’t know if this is unique, but it’s certainly unusual. In Pages, hover over the top or bottom of the page, and you can modify what appears in headers and footers and control details about size and whether they appear in the Document inspector’s Format tab.