This function has not been fully integrated into the long-term Wolfram Language, and is subject to change.


is an option for character selections that specifies how a character is represented on the screen.


  • TabFilling can be set to any character. With the default setting TabFilling->None, characters appear as whitespace.
  • If TabFilling is set to a string, such as ".", the character or characters in the string will be repeated as necessary to fill the available space.
  • Other common settings are Underline and GrayUnderline.


Introduced in 1999