Showing gridlines
You can add gridlines to the visualization background to make it easier to get a reading of the value for an item. Gridlines are dotted lines that are drawn horizontally or vertically from the tick marks on numerical axes.
About this task
The visualizations are by default drawn without gridlines. Gridlines
can be added on the value and category axes in bar charts, and the X- and Y-
axes in line charts, combination charts, and scatter plots provided that the
axes represent numerical values. Examples of visualizations with gridlines are
shown below.


Procedure
Parent topic: Working with visualizations