Playing SOASE on a notbook screen

I have downloaded Sins... onto my MSI notebook. Gameplay is fine but as the standard screen size is larger than my monitor I tap the top or bottom edge with the cursor to scroll to the edges of the screen. However, I have found that when I start the game I cannot scroll in this manner. This makes playing the game impossible has I cannot see or access the lower 1/6th of the screen.

I have changed my display settings and tried making changes on the properties option but cannot seem to get it working properly again.

Any ideas about resolving this?

Thanks,