1  OCC
=TITLE Occlude Button
 Click on the Occlude button to bring up a dialog box, 
 allowing you to specify occlude options for the 
 transaction.  

 This temporarily overrides any default occlusion you may
 have set in the Options menu.  After the current
 transaction, CMS uses whatever defaults you have set in
 the Options menu. 

2  O_d
=TITLE About Occlusion 
 CMS operates on your library search list by searching
 through the library (or libraries) in the list.  If you
 have more than one library in the search list, CMS
 searches the libraries one at a time, in the order in
 which they appear in the search list, until a specified
 object is found.  Once the object is found, CMS performs
 the specified operation on the object. CMS will not 
 continue to search for the object in any of the remaining
 libraries.  
  
 When an object with the same name exists in more than one
 library in the library search list, CMS processes only
 the first occurrence of the specified object and ignores
 any later instances of that object in subsequent
 libraries.  Thus, the first instance of the object
 occludes any subsequent instances of that object. 

 You can direct CMS to search for all occurrences of an 
 object by deactivating occlusion for the object.  

2  Occ_etb
=TITLE Elements Button 
 The Elements button controls occlusion of elements. When
 this button is activated, CMS searches for and acts upon
 the first occurrence of an element found in a library
 (the first library that contains the element) in the
 library search list. 

 If this button is off, CMS acts upon each occurrence of
 the element or elements found in the library search list. 

2  Oc_gtb
=TITLE Groups Button 
 The Groups button controls occlusion of groups. When this
 button is activated, CMS searches for and acts upon the
 first occurrence of a group found in a library (the first
 library that contains the group) in the library search
 list. 

 If this button is off, CMS acts upon each occurrence of
 the group or groups found in the library search list. 

2  Oc_ctb
=TITLE Classes Button 
 The Classes button controls occlusion of classes. When
 this button is activated, CMS searches for and acts upon
 the first occurrence of a class found in a library (the
 first library that contains the class) in the library
 search list. 

 If this button is off, CMS acts upon each occurrence of
 the class or classes found in the library search list. 

2  Oc_otb
=TITLE Others Button 
 The Others button controls occlusion of other objects,
 including the element list, the group list, the class
 list, library attributes, history, and commands. 

 When this button is activated, CMS searches for and acts
 upon the first occurrence of the object (or objects) in
 the library search list.  
 
 If this button is off, CMS acts upon each occurrence of
 the object or objects found in the library search list.