The Amiga’s Intuition library, the core engine of the GUI, can draw graphics primitives on “screens”. Because of the Copper co-processor which displays the scre

The Amiga’s Intuition library, the core engine of the GUI, can draw graphics primitives on “screens”. Because of the Copper co-processor which displays the screen raster line by raster line, these screens can have different resolutions with different numbers of colors - all of them displayed simultaneously on the monitor.