ImageDimensions[image] gives the pixel dimensions of the raster associated with an Image object image.

ImageQ[image] yields True if image has the form of a valid Image object, and False otherwise.

ImportString["data", " format"] imports data in the specified format from a string. ImportString["data", elements] imports the specified elements.ImportString["data"] ...

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 ...

Left is a symbol that represents the left-hand side for purposes of alignment and positioning.

Links[] gives a list of all MathLink connections that are currently open. Links[patt] lists only links whose names match the specified string pattern.

MultilaunchWarning is a global option that specifies whether a warning is given when you try to modify user preferences while running two copies of Mathematica simultaneously.

NotebookFileName[] gives the file name of the current evaluation notebook. NotebookFileName[nb] gives the file name for the notebook specified by nb.

NotebookInformation[] gives a list of properties of the current evaluation notebook.NotebookInformation[notebook] gives a list of properties for the specified notebook.

Null is a symbol used to indicate the absence of an expression or a result. It is not displayed in ordinary output. When Null appears as a complete output expression, no ...