1. Click the checkbox 'Show projection' to turn the vector projection on and off. [br]2. Click on the point to move the position vector [b]a[/b] and observe the effect on the vector projection. [br]3. Click on the point to move the position vector [b]b[/b] and observe the effect on the vector projection. [br]4. Click 'Reset view' to reset the zoom and axes.