1. Tap Insert Shapes   on the toolbar;

2. Select Color to change the color of shapes;

3. Select Opacity to change opacity of shapes’ border;

4. Select Size to change shapes’ border width;

5. Select Rectangle  to draw a rectangle;

6. Select Circle  to draw a circle;

7. Select Arrow  to draw an arrow;

8. Select Line to draw a straight line;

9. Choose Fill to select the fill color and opacity of shapes.