DefaultTicksStyle is a low-level option for graphics functions that specifies the default style to use in rendering ticks.
DeleteContents is an option for DeleteDirectory that specifies whether the contents of directories should automatically be deleted.
Evaluator is an option for objects such as Button, Dynamic, and Cell that gives the name of the kernel to use to evaluate their contents.
FactorInteger[n] gives a list of the prime factors of the integer n, together with their exponents. FactorInteger[n, k] does partial factorization, pulling out at most k ...
FunctionSpace is an option for FindSequenceFunction and related functions that specifies the space of functions to consider for representations.
ImageDimensions[image] gives the pixel dimensions of the raster associated with an Image object image.
ItemStyle is an option for Grid, Column, and related constructs that specifies styles to use for items.
LanguageCategory is an option for Cell that determines in what category of language the contents of the cell should be assumed to be for purposes of spell checking and ...
LinkInterrupt[link] sends an interrupt to the program at the other end of the specified MathLink connection.
Masking
(Built-in Mathematica Symbol) Masking is an option for various image analysis and processing functions that specifies on which regions they should operate.