CurrentValue[item] gives the current value of item at a location in the Mathematica system and interface. CurrentValue[{item, spec}] gives the current value for the feature ...

Finish makes the debugger run through the entire evaluation, ignoring any breakpoints.

Halt interrupts the debugger and displays the evaluation stack.

Continue resumes debugging from one breakpoint to the next breakpoint.

Step makes the debugger stop at the beginning of the next expression.

Step In stops the debugger at the next stopping point.

Toggle Breakpoint toggles a breakpoint on or off.

Mathematica normally takes any expression it is given, and evaluates it as far as possible. But built into the Mathematica language is a collection of flexible primitives ...

Widget["RadioButton"] represents a radio button.

DialogReturn[expr] closes a dialog window, returning the expression expr from the dialog.DialogReturn[] closes a dialog window, returning Null.