But notice the white triangle that is added to the swatches, which means that the colors are now Global. 
This results in a new Color Group , where the selected colors are grouped together inside the Swatches panel. 
Select the Color Group inside the Swatches panel. … The Pantone Swatch Libraries are under Color Books and as an example choose: Pantone solid coated and let go. 
Now watch the difference we have here: Over the button we just released it says: PANTONE solid coated and in the upper left corner you see that a dot has been added to the white triangle , meaning that we now have changed the Color Group to spot colors, which Pantone colors are . 
Before you click OK be sure that Recolor Art is checked.