TokenWords is an option for Read and related functions which gives a list of token words to be used to delimit words.
UnderoverscriptBoxOptions -> {opt_1 -> val_1, opt_2 -> val_2, ...} is an option for selections that specifies settings for UnderoverscriptBox objects.
UnderscriptBoxOptions -> {opt_1 -> val_1, opt_2 -> val_2, ...} is an option for selections that specifies settings for UnderscriptBox objects.
UsingFrontEnd[expr] evaluates expr, making use of a front end if necessary.
ValidationLength is an option to FindSequenceFunction and related functions that specifies the number of elements in the input sequence that should be used to validate a ...
WindowOpacity is a notebook option that determines the overall opacity of a displayed window.
WindowStatusArea is a notebook option that specifies what should appear in the status area in the frame of the window used to display the notebook.
WindowToolbars is a notebook option that specifies the toolbars to include at the top of the window used to display the notebook on the screen.
WordSearch is an option for Find and FindList that specifies whether the text searched for must appear as a word.
$Display gives a list of files and pipes to be used with the default $DisplayFunction.