Region
Regions appear as rounded rectangles in the Tracks area. They represent the recordings and added media files in a project, and act as a container for audio or MIDI events.
There are five types of regions: audio regions, MIDI regions, Drummer regions, pattern regions, and folder regions (usually referred to as folders). By default, each region type uses a different color: For example, audio regions are blue, MIDI regions green, and Drummer regions yellow.
![Figure. Region types with default colors](https://help.apple.com/assets/61969817CE76B47A346B2B67/6196981BCE76B47A346B2B86/en_US/3bfadaaa39226ae35b4c5e08dd27e353.png)