NB: More recent documentation for Dyalog APL is available at https://docs.dyalog.com/20.0/.

Rect Properties

Type	Points	Size
Radius	FCol	BCol
LStyle	LWidth	FStyle
FillCol	Coord	Visible
Event	Dragable	OnTop
CursorObj	AutoConf	Data
EdgeStyle	Accelerator	KeepOnClose
DrawMode	MethodList	ChildList
EventList	PropList