Legacy Documentation: Version 4.3.0
EditorGUI.RectField
static function RectField(position: Rect, value: Rect): Rect;
static function RectField(position: Rect, label: string, value: Rect): Rect;
static function RectField(position: Rect, label: GUIContent, value: Rect): Rect;
Parameters

position Rectangle on the screen to use for the field.
label Optional label to display above the field.
value The value to edit.
Returns
Rect The value entered by the user.
Description

Make an X, Y, W & H field for entering a Rect.


Rect field in an Editor Window.
	// Find all the cameras in the scene and shows all their viewports togheter
	
	class EditorGUIRectField extends EditorWindow {
		
		var cameras : Camera[];
		
		@MenuItem("Examples/Editor GUI RectField usage")
		static function Init() {
			var window = GetWindow(EditorGUIRectField);
			window.position = Rect(0,0,150,120);
			window.Show();
		}
		
		function OnGUI() {
			if(GUI.Button(Rect(3,3,position.width-6,20),"Update list"))	
				cameras = FindObjectsOfType(Camera);
			
			if(cameras)
			for(var i = 0; i < cameras.Length; i++) {
				cameras[i].rect = EditorGUI.RectField(
						Rect(3,25+45*i,position.width - 6, 25),
						cameras[i].name,
						cameras[i].rect);
			}
		}
	}
Description

Make an X, Y, W & H for Rect using SerializedProperty (not public).