BlendPRO-II allows easy transition from presentations involving independent screens to multiple projector wide-screen presentations.  Input source selection, seamless switching, and image processing control functions are performed by multiple ScreenPRO-II units. The outputs from the ScreenPRO-IIs are fed to a BlendPRO-II which creates data overlap and edge feathering completely transparent to the operator. Test patterns are provided to support projector alignment.