You can create a visible grid to aid in page layout using the guidelines feature of your page layout software or by drawing lines or boxes that you place on a non-printing layer of your publication.

If you look a bit further down in the source code, you will see the code responsible for handling the printing of the grid names and map sets (Listing 5).

Because of high tension, the net from the small, off-grid and ink stripping well, can get high - precision, high-quality printing results.