Choose the Known Libraries... menu item to specify
  multiple library names that CMS stores and displays
  each time you enter CMS.

  When you enter CMS, the libraries you specified are
  shown in the Open Library dialog box.  To open one
  of the known libraries, do the following:

  1. Pull down the Library menu.
  2. Pull down the Open... submenu; the Open Library
     dialog box appears.
  3. Double click on the desired library displayed in
     the Known Libraries box.

1  –  Kl f

  The Known Libraries box displays all the known libraries
  that you specified in the Library Specification(s) field.

  The libraries you specify are then displayed in the Open
  Library dialog box each time you enter CMS.  Double click
  on one or more of the known libraries to open the library.

  Double click on the Library Specification(s) field from
  the additional topics below for more information on
  entering library specifications.

2  –  Kl lsf

  Fill in the Library Specification(s) field with one or
  more library specifications.

  To specify a library search list, enter the library
  specifications on one line, separating each specification
  with a comma.  When you double click on the search list
  from the Known Libraries box in the Open Library dialog
  box, CMS opens the entire search list.

  To specify individual library names, enter a single
  library specification, then choose the Add button.  Do
  this for each library specification.  Each time you
  choose the Add button, CMS adds each name in list form
  to the Known Libraries box.  You can specify up to ten
  libraries in the Known Libraries field.

3  –  Kl apb

  Click on the Add button to add the specified library or
  libraries to the Known Libraries box.

  CMS automatically adds the new library (or libraries)
  to the beginning of the library list.

4  –  Kl re pb

  Click on the Remove button to remove one or more
  libraries from the Known Libraries box.  First choose the
  library or libraries to be removed; then choose the
  Remove button.

  The remove transaction does not delete the library;
  however, it removes the library from the immediate list
  of known libraries.