You can use the ‘freehand drawing’ and the ‘shapes’ tool. The ‘freehand drawing’ tool allows you to scribble or freehand draw on your document. Use the additional options provided to customize the color and thickness of the line. The ‘shapes’ tool allows you to draw squares, circles and lines. You can customize the line color, fill color and border line thickness. Once you create a drawing, click on it to reposition or delete it.