$ControlActiveSetting (Built-in Mathematica Symbol)

$ControlActiveSetting is a symbol whose value is True if it is evaluated while a control is active, or in certain other previewing situations.

Locator (Built-in Mathematica Symbol)

Locator[{x, y}] represents a locator object at position {x, y} in a graphic. Locator[Dynamic[pos]] takes the position to be the dynamically updated current value of pos, with ...

EventHandler (Built-in Mathematica Symbol)

EventHandler[expr, {"event_1" :> action_1, "event_2" :> action_2, ...}] displays as expr, evaluating action_i whenever "event_i" occurs in connection with expr.

Mouseover (Built-in Mathematica Symbol)

Mouseover[expr, over] represents an object that displays as over when the mouse pointer is over it, and as expr otherwise.

Dynamic (Built-in Mathematica Symbol)

Dynamic[expr] represents an object that displays as the dynamically updated current value of expr. If the displayed form of Dynamic[expr] is interactively changed or edited, ...

DynamicModule (Built-in Mathematica Symbol)

DynamicModule[{x, y, ...}, expr] represents an object which maintains the same local instance of the symbols x, y, ... in the course of all evaluations of Dynamic objects in ...

NIntegrate (Built-in Mathematica Symbol)

NIntegrate[f, {x, x_min, x_max}] gives a numerical approximation to the integral \[Integral]_x_min^x_max\ f\ d \ x. NIntegrate[f, {x, x_min, x_max}, {y, y_min, y_max}, ...] ...

FrameMargins (Built-in Mathematica Symbol)

FrameMargins is an option for objects that can be displayed with frames which specifies the absolute margins in printer's points to leave inside the frame.

TabView (Built-in Mathematica Symbol)

TabView[{lbl_1 -> expr_1, lbl_2 -> expr_2, ...}] represents an object in which clicking the tab with label lbl_i displays expr_i. TabView[{lbl_1 -> expr_1, lbl_2 -> expr_2, ...

User Interface Structuring & Layout (Mathematica Guide)

Mathematica's symbolic architecture makes it unprecedentedly easy to create and manipulate sophisticated layouts for user interfaces—both as static structures and with ...