Guide:

Draw mode switches between a single tile view and a 2x2 tile view.

To save tile data, click the "generate download link" button and then click the link that appears.

To open existing tile data click the "Choose file" button and select a file to load.

Other stuff:

This is a link to the tile data for the text used to create the page header. It's still incomplete and currently only contains the letters used in the header.