above  Separate the pieces of a pile or matrix column.

back n  Move backwards horizontally n 1/100s of an em.

bold  Change to bold font.

ccol  Centeralign a column of a matrix.

cpile  Make a centered pile (same as pile).

define  Create a name for a frequently used string.

delim xy  Define two characters to mark the left and right ends of an eqn
equation to be printed inline. Use delim off to turn off
delimiters.

down n  Move down n 1/100s of an em.

fat  Widen the current font by overstriking it.

font x 
Change to font x,
where x is the name or
number of a font.

from  Used in summations, integrals, and similar constructions to signify the
lower limit.

fwd n  Move forward horizontally n 1/100s of an em.

gfont x  Set a global font x for all equations.

gsize n  Set a global size for all equations.

italic  Change to italic font.

lcol  Leftjustify a column of a matrix.

left  Create big brackets, big braces, big bars, etc.

lineup  Line up marks in equations on different lines.

lpile  Leftjustify the elements of a pile.

mark  Remember the horizontal position in an equation. Used with lineup.

matrix  Create a matrix.

ndefine  Create a definition that takes effect only when neqn is running.

over  Make a fraction.

pile  Make a vertical pile with elements centered above each other.

rcol  Rightadjust a column of a matrix.

right  Create big brackets, big braces, big bars, etc.
Must have a matching left.

roman  Set following constant in roman.

rpile  Rightjustify the elements of a pile.

size n  Change the size of the font to n.

sqrt  Take the square root of the following equation element.

sub  Start a subscript.

sup  Start a superscript.

tdefine  Make a definition that applies only to eqn.

to  Used in summations, integrals, and similar constructions to signify the
upper limit.

up n  Move up n 1/100s of an em.

~  Force extra space into the output.

^  Force a space onehalf the size of the space forced by ~.

{ }  Force eqn to treat an element as a unit.

"..."  A string within quotes is not subject to alterations by eqn.
