The chart widget in which the axis gridlines are enabled makes it easier for the users to read the values.
Grid lines can be turned on or off using the checkbox option provided in the Grid lines section
of in the widget’s property pane
for each chart axes.
This allows you to toggle the visibility of the Primary Value Axis gridlines
for the chart. This option is by default enabled in the charts.
This allows you to toggle the visibility of the Secondary Value Axis gridlines
for the chart. This option will be displayed in the widget only when the secondary axis is used.
This allows you to toggle the visibility of the Category Axis gridlines
for the chart. By default, this option is disabled.