By clicking this button on the toolbar you can open the dialog window:



where you can define all the parameters for the polars you are going to draw.
Clicking 'Draw' this new document will appear:



where you can see Cl(Re) and Cd(Re) graphs.
This documents has 2 pages, we can navigate among them by clicking the buttons

where the one relative to the current page is disabled.
Here is how you can see next page:



where you can see Cl/Cd(Re) and Cm(Re) graphs.