Represents a standalone interactive control bound to a variable. In a
Control[{u, dom}]
Control[{{u, u init}, dom}]
Head[Control[{x, 0, 1}]]
→ ControlHead[Control[{x, {a, b, c}}]]
→ ControlHead[Control[{x, {0, 0}, {1, 1}}]]
→ ControlHead[Control[{xy, 0, 1, ControlType -> Slider2D}]]
→ ControlHead[Control[{int, 0, 1, ControlType -> IntervalSlider}]]
→ ControlHead[Control[{{x, 0.5, "variable"}, 0, 1}]]
→ Control