A Blank Map can be created by selecting the Blank Map (Auto Scale) option on the Map menu.
Note: If you were using a Blank Map the last time you were using OziExplorer and have the "Load Last Map" configuration option set, the Blank Map will be created automatically.
When first created the Blank Map will be calibrated to cover the entire world. When you load data from file or download data from the GPS the map will automatically rescale itself so the data will fit completely on the map. When any additional data is added or deleted manually, you can use the ReScale Blank Map option on the Map Menu. Other than by using the zoom option there is no way for the user to set this scale.
By default a 10 degree grid is drawn on the map, different grids can be selected by choosing the Blank Map Grid on the Map menu.