Plots > Working with Plots > Axes and Tick Marks > Editable Tick Marks
  
Editable Tick Marks
Each axis contains three editable tick marks: the lower limit, the upper limit, and the tick mark interval. These tick marks work in the same way as the step range operator. Changing the second tick mark is equivalent to changing the step size of the operator.
X-axis editable tick marks
Lower limit
Tick mark interval
Upper limit
Y-axis editable tick marks
Lower limit
Tick mark interval
Upper limit