By 'rows' do you mean 'lines' as in Cell Borders?
If so, you can either:
1) go to the menu and choose File | Page Setup, then on the Sheet tab of the
dialog box, check Gridlines, or
2) highlight the range of cells you want in your print range, then from the
menu choose Format | Cells and go to the Border tab and apply cell borders
the way you want them to appear
Duke