Changing colour of the Vowels by two different speakers in Vowel Editor Trajectory for Comparison

cupid lucid

Dr Paul & all.

Below is a trajectory of the vowels of two different speakers, Vowels of both the speakers have the same colour (Grey) in Praat. How can I change the colour of the vowel symbols of these two different speakers to present a difference between these speakers? The following picture depicts my problem, please: