lhs -> rhs or lhs -> rhs represents a rule that transforms lhs to rhs.

ShowCursorTracker is an option for Cell that specifies whether an elliptical spot should appear momentarily to guide the eye if the cursor position jumps.

StatusArea[expr, string] displays string in the status area of the current notebook when the mouse pointer is in the region where expr appears.

TraceDialog[expr] initiates a dialog for every expression used in the evaluation of expr. TraceDialog[expr, form] initiates a dialog only for expressions which match form. ...

WindowMargins is a notebook option that specifies what margins to leave around the window that is used to display the notebook on the screen.

WindowSize is a notebook option that specifies the size of window that should be used to display a notebook on the screen.

Other tutorials have discussed explicit loading of Mathematica packages using <<package and Needs[package]. Sometimes, however, you may want to set Mathematica up so that it ...

If you make a definition such as f[x_]:=value, Mathematica will use the value you give for any f function it encounters. In some cases, however, you may want to define a ...

When you are putting and getting data via MathLink various kinds of errors can occur. Whenever any error occurs, MathLink goes into a completely inactive state, and all ...

A standard electronic calculator does all your calculations to a particular accuracy, say ten decimal digits. With Mathematica, however, you can often get exact results. ...