drawing

all you need is the drawing library

at the end of your google maps URL, append '&libraries=drawing'

initialize the DrawingManager, and add it to your map!

          
            let drawingManager = new maps.drawing.DrawingManager({
              drawingMode: null,
              drawingControl: false
            });
            drawingManager.setMap(this.map);
          
        

drawingControl: false because we'll be creating our own custom toolset!