Add as many avatars to your project as you like.
To create a new avatar, go to My Robots (click the arrow in the upper left corner and navigate to My Robots).
Click the Add new Avatar Button:
Your avatar gets the date and time as its name. But you can change the name by clicking on the name after the avatar is created. This will help you find the avatar faster later.
Here in the My Robot section you can also assign your project to your avatar.