A plot area label style, which you can change at any time, is applied to plots when they are created.
The two components of a plot style that display are the plot segment line and the area fill. Area fill is a hatch pattern that you can apply to the entire plot area, or use to mark a border around the inside of the plot boundary. You can set a fill distance to define the width of the filled border.
For information about applying plot styles during the creation process, see Default Settings for New Plots.
If the label is not visible, see To Hide or Show Plot Labels.
If you have selected the label correctly, the label text and its anchor point are highlighted.