TCustomMemo = class(TCustomPresentedScrollBox, ITextSettings, ITextActions, IVirtualKeyboardControl, ICaret)
class PASCALIMPLEMENTATION TCustomMemo : public Fmx::Scrollbox::TCustomPresentedScrollBox
TCustomMemo is the base class from which all FireMonkey multiline text editing controls, providing text scrolling, are derived.
TCustomMemo provides a separation between data and presentation. The data is accessible through the Model property. You can configure the presentation of the component through some properties like StyledSettings and TextSettings.
When not in focus, TCustomMemo does not draw a selection rectangle even though the user has selected the text. You can verify whether the text is selected by using the SelText property.