Add Reference Lines
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Editor > Add > Reference Lines

Graphs that support this function

Choose to display reference lines. By default, Minitab displays labels for each reference line drawn. Customize reference lines using scale editing.

Dialog box items

Show reference lines at Z values: (3D graphs only) Type the z-scale values for displaying reference lines.

Show reference lines at Y values: Type the y-scale values for displaying reference lines.

Show reference lines at X values: Type the x-scale values for displaying reference lines.

Show reference lines at data values: (Categorical graphs only) Type the data values for displaying reference lines.

Show reference lines at category scale positions:  (Categorical graphs only) Type category-scale values for displaying reference lines. Values that do not correspond with a categorical value will not be labeled.

Show reference lines at time scale positions:  (Time series plot and area graph only) Type time-scale values for displaying reference lines. Values that are not integers will not be labeled.