You can control all aspects of the Vertical Axis. You can change the scale, convert the numbers into thousands or millions, or change the format of numbers on the chart.
If you format the Vertical Axis, besides the standard options of colours and effects, there are a number of very specific and very useful options.
Tick Marks, labels and numbers
You can even control things like
(1) tick marks
(2) Label position.
(3) allows you to change how you see the numbers. 
To see the full course contents click here.