Select gridline > Editor > Edit Gridlines > Attributes
Use to specify the type, color, and size of your gridlines. To add gridlines to a graph, choose Editor > Add > Gridlines.
Major Gridlines
Automatic: Choose to accept the default line attributes.
Custom: Choose to change the line attributes.
Type: Choose a line type.
Color: Choose a line color.
Size: Choose a line thickness.
Minor Gridlines (not available with simplex design plot)
Automatic: Choose to accept the default line attributes.
Custom: Choose to change the line attributes.
Type: Choose a line type.
Color: Choose a line color.
Size: Choose a line thickness.
Apply same attributes to gridlines of all scales: Check to apply the attributes set in this dialog to all gridlines on the graph.
<Show> (not available with simplex design plot)