If you are ever in a position where the screen does not launch quite as expected, you may find you need to put the game in Windowed mode before it launches. Details on how to do this below:
- Open Steam and access your Games Library
- Right-click on Football Manager 2018 -> Properties -> General -> Set Launch Options
- Type this in the box: -small_screen -windowed
- Click on OK, close the window and launch FM18 through Steam
You will find the game now launches in Windowed mode.