To do this:

Press this:

Set the zoom factor to fit to window

F8

Set the zoom factor to 50%

F10

Enter or exit full screen mode

F11

View the part of your chart above the window

Page Up

View the part of your chart below the window

Page Down

View the topmost box in your chart

Home

View boxes at the bottom of your chart

End

Show a thumbnail view of the chart

Ctrl + H