Crosshairs are a tool that displays the x- and y-values of any point on a graphs such as a scatterplot. As you move the mouse pointer, the crosshairs location and coordinates update. Crosshairs are a quick and easy way to explore your graph.
A flag is at type of graph annotation that displays the precise x-, y-, and z-values for any point on a contour plot that you get with a DOE analysis. Use a flag to determine the response value for a particular combination of factor or component levels. Flags are permanent annotations on the graph; therefore, they are useful for reports and presentations.
For added precision, you can plant a flag in conjunction with crosshairs. First, use crosshairs to find the exact coordinates at which you want to plant a flag. Then right-click and choose Plant Flag.