what do I need to do to make gridlines also print on my spreadsheet?

My spreadsheet prints but without the gridlines. I want the gridlines to print also

If you want all of the grid lines to print,

Format menu

Page item

Sheet tab in the Page dialog

Print section, select Grid

Just type “Print grid” into the search box of this site (though this advice has already given by @robleyd here, where you have asked the same question for the first time)