Does the Elfin Flip Plus support keystone correction?

Yes. The Elfin Flip Plus supports both automatic vertical and horizontal keystone correction and manual vertical and horizontal keystone correction ( ±25 Degrees), allowing users to set up their device where they desire with incredible ease. For further adjustment, please use the 4-point manual keystone correction feature. To enable automatic keystone correction: Go to "All Settings" -- "Projector" -- "Keystone" -- "Auto Keystone Correction".