Apple Logic Express 9 - Manual (Page 513)

This replaces the take folder with multiple regions that represent the current comp
selections.
You can also flatten a take folder and merge the results. This replaces the take folder with
a single region that represents the current comp selections. All take region sections not
used in the current comp are deleted.
To flatten and merge a take folder
1 Click the arrow in the top right of the take folder to open the pop-up menu, then choose
the comp you want to keep.
513 Chapter 15 Editing Audio Take Recordings