Planar graphics is a display format where bitmap data is organized into separate bitplanes (bit-aligned planes), with each plane containing one bit of the color index for each pixel. This was the native display format of the Amiga's custom chipset, allowing the system to combine up to six bitplanes (OCS/ECS) or eight (AGA) to produce 32 or 256 colors respectively. The planar organization enabled efficient hardware scrolling and sprite handling, though it required more memory bandwidth for random pixel access compared to chunky graphics. This architecture was fundamental to the Amiga's ability to perform advanced tricks like parallax scrolling and Hold-And-Modify (HAM) modes.