Auto: (Default) Let Stat-Ease 360 assign the contour values and limits.
Manual: Select to manually enter contour values on the right side of the dialog.
Incremental: Similar to manual, but by specifying a Start, Step size, and number of levels, the boxes to the right will be filled in automatically.
Min and Max: The minimum and maximum observed values.
Format: Sets the number formatting for the contour labels