Steam allows you to run Pure Farming 2018 in two distinctive screen modes.
a. Borderless window mode (default)
b. Exclusive fullscreen mode
Running the game in the default borderless window mode is usually the most convenient option, as it allows you to choose one of the displays connected to your computer or switching to the default window mode.
The Exclusive mode, on the other hand, forces the game to be displayed in the main display and always in the fullscreen mode. This mode can result in higher performance on specific computer rigs and higher stability for multi GPU configurations.