Each item in the Buffers area list represents an editor buffer. Properties of the buffer such as its size (in bytes) and its mode are displayed. See the LispWorks Editor User Guide for information about editor modes.
Double-click on any buffer to display it in the Editor's text view.
Buffers selected in the Buffers area can be operated on by commands in the Buffers menu, which is also available as the context menu. The associated files can be operated on by commands in the File menu. For example, to save multiple buffers, select them the Buffers area and choose File > Save . See Using Lisp-specific commands for more details.
LispWorks IDE User Guide (Macintosh version) - 25 Nov 2011