I am started programming with LibGDX and and I am very confused about window size and resolution.
Example: - Monitor resolution is 1920×1440 (1440p) - I want to make my game also in 1440p - But the window of the game will be only 1600x900
How did the resolution of screen (1440p) works when window is only 1600x900?
If I will have in my game settings the user can change the resolution to 720p for example, to have better performance.
So how did the changing resolution works?