The Design Poll lets you upload up to four different versions of your design and then poll others in the community for feedback and to rate your different versions. You'll receive the feedback below your design in the Comments section. The feature is only available during the critique phase, and is designed specially to allow for more depth in critiques and feedback. See "How do I start a Design Poll?" to get going!
Note: Be sure to close your poll before voting opens. If your poll is still open, it will revert back to the last submitted design.