It may be necessary to increase the size of the buffer pool above the
                      default setting of 400 KB. See the profile parameter description of
                      EDTBPSIZE in the
                      Parameter Reference documentation.
               
When you open a new editing session from the program editor, the old
                       session is stored in the buffer pool if the profile parameter
                       EDTRB (see
                       the Parameter Reference documentation) is set. When you
                       leave the new session with the cancel or exit function (see also
                       Exit
                          Function), the old session is freed from the buffer pool.
                       The NEXT editor
                       command can be used to jump from one active session to another.
               
If the EDTRB parameter is
                       switched OFF, the ring buffer is not used, and the new session
                       replaces the current session. If the editor profile parameter
                       AUTOSAVE (see
                       Editor Commands) is switched on, the contents of the
                       corresponding session are saved to FUSER.
               
If you intend to use the LOG editor
                       command, we recommend that you increase the size of the buffer pool to 1 MB.
                       Changes are generally stored in the buffer-pool editor.