Only one set of quadrants can exist for a plot. You can control whether quadrants are automatically displayed by checking the Show quadrants box in the 2D Plots page of the Options dialog. The default behavior is for the quadrants to be hidden when the plot is created.

 

You can show the quadrants on a per-plot basis using one of the following methods:

 

Right-click on the plot and select Show Quadrants from the pop-up menu.

 

Select the GatingCreate GatesQuadrants command and click on the plot at the position where you want the central vertex to be located.

 

Right-click on the plot and select the Format menu item. Choose the Quads category. Enable the Show quadrants checkbox.