 		zoomLabel.text = String(format: "%.1f", model.zoom)
 	}
 
-	// MARK: button for zoom in
+
+	// MARK: Button for zoom in
 	
 	lazy var zoomInButton: UIButton = {
 		let instance = UIButton(type: .Custom)

	}
	
	
	// MARK: pinch gesture for zoom in/out
	
	lazy var pinchGestureRecognizer: UIPinchGestureRecognizer = {
		let instance = UIPinchGestureRecognizer(target: self, action: #selector(PrecisionSlider.handlePinch))

		}
	}
	

	// MARK: Label that shows the current zoom factor
	
	lazy var zoomLabel: UILabel = {
		let instance = UILabel()
		instance.textColor = UIColor(white: 0.2, alpha: 1.0)
