This dialog appears when you right-click a chart and select Format Gridlines (available to gauge bubble chart only) > Format Series(Z) Gridline from the shortcut menu. It helps you to format the series (Z) gridline of the chart. See the dialog.
Color
Specifies the color schema for series(Z) gridlines in the chart.
Line Style
Specifies the style for series(Z) gridlines in the chart.
Transparency
Specifies the transparency of the color of series(Z) gridlines in the chart.
Thickness
Specifies the thickness for series(Z) gridlines in the chart.
OK
Applies the changes and closes the dialog.
Cancel
Does not retain any changes and closes the dialog.
Help
Displays this help document.