To address the issue of not being able to alter the screen size while using Fuel Map Australia on your desktop, follow these steps:

1. Check Display Settings:
- Right-click on your desktop and select Display settings.
- Scroll down to the Scale and layout section and ensure that your display resolution is set to an appropriate size (e.g., 1920x1080 for most monitors). Higher resolutions may help fix display issues - learn more.

2. Adjust Fuel Map Resolution:
- Ensure that Fuel Map Australia is set to a resolution compatible with your monitor. Some games or applications may only support certain resolutions, often reverting to a default view. You may want to check the game settings to see if resolution options are available.

3. Modify Configuration Files:
- If the in-game options do not allow you to change the resolution, look for a configuration file in the installation folder of Fuel Map Australia. This file may allow you to manually set the screen resolution by editing a line like “Resolution=1920x1080”.
- The specific path to these files can often be found on community forums or discussion boards related to the game - learn more.

4. Update Video Drivers:
- Ensure that your graphic drivers are up-to-date by visiting the manufacturer's website (NVIDIA, AMD, Intel) and downloading the latest drivers. This may resolve compatibility issues with display settings.

5. Compatibility Mode:
- Right-click on the Fuel Map Australia executable file, select Properties, and navigate to the Compatibility tab. Experiment with running the game in compatibility mode for Windows 7 or Windows 8 and see if it helps with your screen size adjustments.

6. Fullscreen or Windowed Mode:
- In some cases, toggling between fullscreen and windowed mode can resolve display size issues. You can usually do this with the F11 key or by changing the settings in the game.

7. Monitor Settings:
- Check your monitor settings. Some monitors have a built-in scaling option that may need to be adjusted; ensure that it is set to "Auto" or similar settings for optimal performance.

8. Reinstall the Application:
- If all else fails, consider uninstalling and reinstalling Fuel Map Australia. This can sometimes resolve underlying issues caused by corrupted files or improper settings.

By following these steps, you should be able to resolve the screen size alteration issue you are experiencing with Fuel Map Australia. If problems persist, consulting community forums may provide additional solutions tailored to specific software versions - learn more.