I have the latest version of Excel, so I can only answer for that (can't remember where it was for sure on the earlier version). In the latest version when you have the "Home" tab showing, the second subsection, next to "Clipboard" is one called "Font". In that subsection is an icon for choosing what lines you want to show or hide. If I could figure out how to add a screen shot to this message I would be able to show you where it is.