TFrame = class(TControl, IControl)
class PASCALIMPLEMENTATION TFrame : public Fmx::Controls::TControl
TFrame is a container for components; it can be nested within forms or other frames.
When you create frames, they are implemented as descendants of TFrame.
A frame, like a form, is a container for other components. It uses the same ownership mechanism as forms for automatic instantiation and destruction of the components on it, and the same parent-child relationships for synchronization of component properties. But frames can be nested within forms or other frames, and they can be saved on the Component palette for easy reuse. After a frame is created and saved, it continues to function as a unit and to inherit changes from the components (including other frames) it contains. Moreover, an embedded frame continues to inherit changes made to the frame from which it is derived.