Fade in - grab the second icon from left (with the blue line through it ) - pinch, (by holding down the left button), the blue line top or bottom like using tweezers and move it down (or up) to the centre, or any point between. Move along to the right and repeat to your taste. To anchor the 'spot' pinch and release in the same position. Fade out in reverse, similarly. Don't forget - Ctrl & z will undo previous act. Play with it - have fun. (Easier to do than describe!) John