1. Tap the Pen tool to draw a shape in one stroke, but hold your stylus tip at the end of the stroke, and GoodNotes will perfect the shape. As soon as the shape is created, if you keep holding the stylus and move its tip, the shape will change accordingly.
2. Use the Shape tool and draw a shape in one stroke, but without holding the stylus tip like with the Pen tool.
3. To Edit/Move a shape, tap on the shape with your finger (not your Apple Pencil). Alternatively, choose the Shape tool and simply tap on the shape. Adjust the control points of the shape, or move it around.
4. Color-filling a shape can be accessed by tapping the Pen or Shape tool twice for further settings