Select the Shape and select the shape you want to add. 

① Straight Line

Create a straight line with the current brush. Together with another finger, you can create a line at a specific angle.

② Ellipse

Create an ellipse with the current brush. Together with another finger, you can create a circle.

③ Rectangle

Create a rectangle with the current brush. Together with another finger, you can create a square.

④ Freeform

Create a freeform shape with the current brush.