Syntax:  SET TABS VISIBLE boolean

  Specifies whether or not visible tab symbols appear.

  By default, this command hides tab symbols (the parameter value is
  off).  To make tabs visible, specify this command with the parameter
  value on.  The tabs appear as a combination of the HT (horizontal
  tab) symbol and dots (for example, HT.....).

  RELATED COMMANDS:

     SHOW WINDOW ATTRIBUTES