... > Scale > Gridlines
Use to display gridlines at the major and minor tick positions. If you choose gridlines at the minor tick positions, gridlines are also drawn at the major tick positions. After you create a graph you can:
Z major ticks: Check to display gridlines at the z-axis major tick position. This option is only available with 3D plots.
Z minor ticks: Check to display gridlines at the z-axis minor tick position. This option is only available with 3D plots.
Y major ticks: Check to display gridlines at the y-axis major tick position.
Y minor ticks: Check to display gridlines at the y-axis minor tick position. Y minor ticks are not available with probability or percent scales of probability plots.
X major ticks: Check to display gridlines at the x-axis major tick position.
X minor ticks: Check to display gridlines at the x-axis minor tick position. X minor ticks are not available with all graphs.
<Time> (time series plot and area graph only )
<Percentile Lines> (probability plot and Empirical CDF graph only)
<Y-Scale Type> (histogram, probability plot, and Empirical CDF graph only)