Eli5 How does a computer know the size of the monitor when you open a program to full screen?
In: Technology
The computer sends a grid of colours to the monitor, and the monitor displays them. It doesn’t really matter if the monitor is 10” or 80”, the image grid can be the same and will simply be displayed bigger or smaller to fit the physical screen.
Each monitor supports different sizes of grid (the resolution of the image) so you generally have many more pixels on bigger monitors, but if you try and send an unsupported resolution to a screen it won’t display properly. The settings of your computer will allow you to select the best resolution for your display to give you the best-looking image.
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