LongLeftArrow[x, y, ...] displays as x\[LongLeftArrow]y\[LongLeftArrow]....
LongLeftRightArrow[x, y, ...] displays as x\[LongLeftRightArrow]y\[LongLeftRightArrow]....
LongRightArrow[x, y, ...] displays as x\[LongRightArrow]y\[LongRightArrow]....
LowerLeftArrow[x, y, ...] displays as x \[LowerLeftArrow] y \[LowerLeftArrow] ....
LowerRightArrow[x, y, ...] displays as x \[LowerRightArrow] y \[LowerRightArrow] ....
Magenta
(Built-in Mathematica Symbol) Magenta represents the color magenta in graphics or style specifications.
MeshShading is an option for plotting functions that gives lists of colors to use for regions between mesh divisions.
MinusPlus[x] displays as \[MinusPlus]x.MinusPlus[x, y, ...] displays as x \[MinusPlus] y \[MinusPlus] ....
NestedGreaterGreater[x, y, ...] displays as x \[NestedGreaterGreater] y \[NestedGreaterGreater] ....
NestedLessLess[x, y, ...] displays as x \[NestedLessLess] y \[NestedLessLess] ....