Whats the difference between the Optimized (WM) and Locked (FS) screen modes?
– The Optimized mode runs in a window and is generally considered the best way to run the game. The locked mode forces the game to run in a full screen mode, regardless of what resolution you select. The Optimized mode lets you see any Windows dialogue boxes that might open and supports alt-tab to toggle between the game and other applications. Running the game in Locked mode may cause unpredictable behavior if alt-tab is used, but can allow the game to run in a lower resolution in full screen (although the performance benefit will likely be minimal compared to the Optimized mode running at a higher resolution).