$Canceled (Built-in Mathematica Symbol)

$Canceled is a symbol returned when notebook input is canceled, for example from a dialog box.

$DefaultImagingDevice (Built-in Mathematica Symbol)

$DefaultImagingDevice gives the name of the default imaging device attached to the computer.

$MaxMachineNumber (Built-in Mathematica Symbol)

$MaxMachineNumber is the largest machine-precision number that can be used on a particular computer system.

$Urgent (Built-in Mathematica Symbol)

$Urgent gives the list of files and pipes to which urgent output from Mathematica is sent.

Creating Palettes (Mathematica Tutorial)

Palettes are like extensions of your keyboard. They can be used to perform many actions in Mathematica, including entering typesetting characters, styling notebooks, and ...

External Programs (Mathematica Tutorial)

On most computer systems, you can execute external programs or commands from within Mathematica. Often you will want to take expressions you have generated in Mathematica, ...

Introduction to Toolbars (Mathematica Tutorial)

Mathematica's unique symbolic architecture makes it easy to add toolbars with any possible appearance and action to a Mathematica notebook. The ruler is a toolbar used to set ...

Manipulating Expressions in External ... (Mathematica Tutorial)

Mathematica expressions provide a very general way to handle all kinds of data, and you may sometimes want to use such expressions inside your external programs. A language ...

Moving through Expressions (Mathematica Tutorial)

You can use the keyboard to move the cursor forward or backward one character or one word at a time. You can also delete the character or word to the right or the left of the ...

Non-English Characters and Keyboards (Mathematica Tutorial)

If you enter text in languages other than English, you will typically need to use various additional accented and other characters. If your computer system is set up in an ...