Swipe up on the trackpad with two fingers
Use the down arrow key
Press the Space bar
Use the Page Down key
Scroll down with an external mouse wheel
Drag the scroll bar down
Press Fn + Down Arrow
Use a two-finger scroll gesture on the trackpad
Swipe up on the trackpad with two fingers
Use the down arrow key
Press the Space bar
Use the Page Down key
Scroll down with an external mouse wheel
Drag the scroll bar down
Press Fn + Down Arrow
Use a two-finger scroll gesture on the trackpad