Contour/Surface Plots - Contour - Options
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Stat > DOE > Mixture > Contour/Surface Plots > check Contour plot > Setup > Options

Allows you to define the background grid and determine the title of your plot.

Dialog box items

Grid Lines

At intervals: Choose to define the background grid, and then choose an interval from the list.

None: Choose to suppress the display of the background grid.

Title: To replace the default title with your own custom title, type the desired text in this box.