Right now if you attempt to scale the overlay down enough with the controllers, you eventually pass 0 scale and head into the negative values. When this happens, the overlay becomes flipped and mirrored. I can't see any reason you would want this, and IIRC negative values are disallowed in the Input fields anyway. Negative (and probably really small) values should be prevented and will be in v1.0.6.
Right now if you attempt to scale the overlay down enough with the controllers, you eventually pass 0 scale and head into the negative values. When this happens, the overlay becomes flipped and mirrored. I can't see any reason you would want this, and IIRC negative values are disallowed in the Input fields anyway. Negative (and probably really small) values should be prevented and will be in v1.0.6.