ShowCellBracket is an option for Cell that specifies whether to display the bracket that indicates the extent of the cell.
ShowCellTags is an option for Cell that specifies whether to display tags for a cell.
ShowContents is an option for selections that specifies whether an object represented by a StyleBox should be displayed on the screen or replaced by blank space.
Smaller
(Built-in Mathematica Symbol) Smaller is a style or option setting that specifies that objects should be smaller.
StringReplacePart["string", " snew", {m, n}] replaces the characters at positions m through n in " string" by " snew". StringReplacePart["string", " snew", {{m_1, n_1}, {m_2, ...
StringToStream["string"] opens an input stream for reading from a string.
TargetFunctions is an option for functions such as ComplexExpand that specifies what functions to attempt to generate in the output.
TrueQ
(Built-in Mathematica Symbol) TrueQ[expr] yields True if expr is True, and yields False otherwise.
Underlined represents an underlined font.
UnitVector[k] gives the two-dimensional unit vector in the k\[Null]^th direction.UnitVector[n, k] gives the n-dimensional unit vector in the k\[Null]^th direction.