The Wolfram Language includes a variety of non-printing characters, some used to fine-tune layout, and others used to define precise syntactic interpretations while maintaining the traditional look of various mathematical notations.

Spacing Characters

\[ThickSpace]  ▪  \[MediumSpace]  ▪  \[ThinSpace]  ▪  \[VeryThinSpace]

\[NegativeThinSpace] — "negative space" to bring objects closer together

\[NegativeThickSpace]  ▪  \[NegativeMediumSpace]  ▪  \[NegativeVeryThinSpace]

\[LetterSpace] — an almost-invisible space treated as a letter, e.g. in a symbol name

Line-Breaking Control

\[NonBreakingSpace] — insert a space, but do not allow it to be at a line break

\[NoBreak] — ensure that no line break occurs at this point

\[IndentingNewLine] — insert a new line, with indentation on the next line

\[DiscretionaryHyphen] — hyphen to include only at a line break

Alignment Markers

\[AlignmentMarker] — represent a position that should be aligned in a grid

Invisible Wolfram Language Syntax

\[InvisibleSpace] — invisible character treated like a space in Wolfram Language syntax

\[InvisibleComma] — invisible character treated like a comma

\[InvisibleApplication] — invisible character making behave like

\[ImplicitPlus] — invisible character representing addition (e.g. in compound fractions)

\[InvisiblePrefixScriptBase]  ▪  \[InvisiblePostfixScriptBase]