DefaultFrameStyle is a low-level option for graphics and related constructs that specifies the default style to use in displaying their frames.
FractionBoxOptions -> {opt_1 -> val_1, opt_2 -> val_2, ...} is an option for cells that specifies settings for FractionBox objects within the cell.
LimitsPositioning is an option for UnderoverscriptBox and related boxes that specifies whether to change the positioning of underscripts and overscripts in the way ...
LineIndent is an option for Style and Cell that specifies how many ems of indentation to add at the beginnings of lines for each level of nesting in an expression.
StyleData["style"] is a low-level representation of the contents of a style definition cell.StyleData["style", " environment"] represents the contents of a style definition ...
UpSet
(Built-in Mathematica Symbol) lhs ^= rhs assigns rhs to be the value of lhs, and associates the assignment with symbols that occur at level one in lhs.
$Path
(Built-in Mathematica Symbol) $Path gives the default list of directories to search in attempting to find an external file.
We first encountered lists in "Making Lists of Objects" as a way of collecting numbers together. Here, we shall see many different ways to use lists. You will find that lists ...
Explicit representations of newlines and tabs in strings. This prints on two lines. In InputForm there is an explicit ∖n to represent the newline.
PGM
(Mathematica Import/Export Format) MIME type: image/x-portable-graymap PGM grayscale raster image format. Member of the Portable family of image formats. Related to PBM and PPM. Implements a subset of the PNM ...