To move up or down keep your mouse in the pink area
Instructions while reading: Click on the Full Page View. 

To terminate Full Page View press on the Escape key on your keyboard (esc) normally top left row.

To navigate: After being in Full Page double click on the view. Top Right Corner there is a window Thumb. Position your mouse on the Thumb and move up or down, left or right while holding the clicking on the mouse.

To expand the view click on the zoom + or minus. .
To download the history click