Currently you can change your Display Name in the My Settings tab: This changes the name displayed under your avatar (by default on the bottom left corner of the screen): By default the avatar's image is your roll20 profile image, but if you have one or more characters under your control, you can change it to that character's portrait by selecting it in the chat: Yet the name remains the same. My suggestion is that selecting a character in the chat's dropdown menu should not only change your avatar's image, but also change your display name automatically to that of the character selected. Having to manually edit the Display Name each time one changes character is a waste of time, and I believe this could be very easily implemented.
