Exam 77-420 Microsoft Excel 2013 5. Create Charts and Objects  5.2 Format a Chart: Apply Chart Layouts and Styles (Chart Elements) Gridlines   Chart Elements -> Gridlines-> Primary Major Horizontal Chart Elements: Gridlines One more Chart Element. Gridlines can help line up the data (Columns, Bars) with the Axis.   9. Try it: Modify the Chart Gridlines Select the Chart before you begin. Go to Chart Elements -> Gridlines.   What Do You See? The options include: Primary Major Horizontal Primary Major Vertical Primary Minor Horizontal Primary Minor Vertical More Options...   Select: Primary Major Horizontal.