# Region List

To the right of the track display is the region list, which uses a tree display to show all regions in the session. There are sections in the region list, “Captured” and “External”. “Captured” contains all regions that were either recorded by Ardour or imported as native audio files. “External”contains regions created using audio files external to Ardour (from a sample library, for example).

## Organization of the region list

In both sections of the region list, any regions containing multiple channels will have its name followed by “[N]” where N is a number indicating the number of channels. Any region that ends in “-N”, where N is a number, is a region that describes an entire audio file. Any region that ends in “.N” is a region that describes part of an audio file. Any subtree within the region list can be hidden or displayed by clicking on the box left of its name.

Within the Captured part of the tree, each track is represented by its own subtree (strictly speaking, its not each track but each playlist that is represented). Within that subtree is an entry for each take recorded for that track. Remember that each take is stored as one and audio files (strictly, one per channel). Within the take tree is an entry for each region created from that take.

Within the External part of the tree, there is a subtree for each audio file embedded into the session. Within that subtree are entries for each region created from that audio file.

## Region list operations

Click on the box to the left of the name of part of the tree to hide/show that part of the subtree.

Click the name of a region and then drag it to the track display area to insert a region into a track.

Click on the title bar of the region list to display a menu allowing you to

### Region List Context Menu

Menu Item | Description
--- | ---
Find
Show/Hide All | fully expand or collapse the region list
Sort
Display Automatic Regions normally, | Ardour does not display regions created as a result of a side effect of user actions. If this option is selected, all regions will be included in the region list.
Import audio files | copy (and if necessary convert) audio files into the session. See Importing for more details.
Embed audio file | embed external audio files into the session. No new files are created, and no format conversion is done. See [[editing:Embedding]] for more details.