1.If the diagram is in a document or a worksheet, double-click on the diagram to open it.
To display a horizontal or vertical grid line:
2.Click Diagram Design[Diagram Layout] > Add Diagram Element and select Horizontal Grid Lines or Vertical Grid Lines.
To toggle individual grid elements on or off:
2.Double-click on the diagram plane to open the Properties dialog box.
3.Click on the Grid & Background tab.
3D Diagram:
4.Select the tab for the coordinates plane for which you want to display a grid.
5.Select the grid elements to be displayed.
2D Diagram:
4.Select the grid elements to be displayed.
If you are using several Y axes and/or X axes in a 2D diagram, you can specify for each individual axis whether or not grid lines are to be displayed for their divisions.
1.Double-click on the axis to open the Properties dialog box.
2.Click on the Appearance tab.
3.Check the option Account for this axis when drawing the grid or remove the checkmark.
Note You can also delete selected grid elements under Format[Lines] > Color by selecting the entry No Line.