Filter
 The filter command allows you to control  what files you see
 in the Left or Right file panels.

 There are three options:

          +-------- Filter ---------+
          | Select files to display |
          |  Custom: _              |
          |   [ ] Hidden files      |
          |   [ ] Executable files  |   .--- .com, .exe, and
          --------------------------|        .bat files only
          |   [ Ok ]   [ Cancel ]   |
          +-------------------------+

Custom
 Custom allows you to supply a DOS wildcard pattern to select
 which files you view.

[x] Hidden files
 Check this box if you want to see hidden files (which appear
 with a # between the name and extension).

[x] Executable files
 Shows only program and batch files. Turn  this option off if
 you wish to see all files.

DOS Wildcard Characters
-----------------------
 DOS file names have two parts: the name (which  can be up to
 8 characters) and  the  extension (which  can  be  up  to  3
 characters)  with  a  period   in   between.  For   example,
 "filename.ext".

    *   Matches any characters for the  rest of the  name  or
        extension.  "a*" will  match "a", "ab", and "abc", as
        well as many others.  `*' applies just to one part of
        the  file  name, so "a*"  will not match "ab.c".  Use
        "a*.*" to find all files that start with `a' and have
        any extension. (Note: "*a" will match  any  name, and
        not just names with an `a' at the end  as  you  might
        expect.)

    ?   Matches one character.  So "a?" will match "a", "ab",
        "ac", etc. "????" will match any name with up to four
        characters,  and "a*.??z" will  match  any  file name
        starting with `a' and ending with `z'.