My earlier post discussed how to make grid lines visible when printing a Numbers spreadsheet. The idea is to make it more readable. Here is a better way to do that while making your printed out put more visually appealing.
By default, Numbers does not print grid lines. Someone figured no one wanted that, but it's clear that a lot of folks do want grid lines to help make a spreadsheet more readable. There actually is a better way to do that without turning on grid lines, but let's start with that.