Open the game and navigate to the main menu.
Click on Scenario Editor to start creating a new map.
Enter a name for your new map in the provided field, then press the Start button.
Once the map loads, you’ll see a default layout with grass tiles.
To save your map, click on the Save button. The button on the left enables or disables autosave. Remember to save your map after every change, or enable autosave to ensure progress is automatically saved.