SET FIND CASE EXACT
  Enables case-exact searches---particularly useful to find or replace
  lowercase occurrences only.
  Example:
     The following commands enable case-exact searches and then find
     "digital" if it occurs only in all lowercase:
        Command: SET FIND CASE EXACT
        Command: FIND digital
  Usage notes:
  o  The setting applies to FIND, GLOBAL REPLACE, REPLACE, and WILDCARD
     FIND.
  o  Default is SET FIND CASE NOEXACT---searches find any occurrence if you
     enter the search string in lowercase, and find an exact match if you
     enter it in uppercase or mixed case.
  o  The setting applies in all buffers. To save your setting for future
     editing sessions, use SAVE ATTRIBUTES to create a section file or to
     create or update a command file. See help on Attributes.
  o  On DECwindows, you can toggle the setting as follows:
        1.  Choose Global Attributes from the Customize menu.
        2.  Click M1 on Set Find Case Exact in the dialog box.
  Related topics:
     Attributes    FIND                     GLOBAL REPLACE
     REPLACE       SET FIND CASE NOEXACT    WILDCARD FIND