Abstract: A method of adding digital functionality to a scope. A scope reticle from the scope is aligned with a virtual reticle from a digital overlay of an electronic display device coupled to the scope. The scope reticle is present in a first coordinate space of the scope image and the virtual reticle is present in a second coordinate space. The alignment of the reticles maps the first coordinate space to the second coordinate space. The coordinate spaces are then locked and the virtual reticle is made invisible, switching from a configure mode to an operate mode. Digital functionality can then be provided to the scope via the digital overlay. This may include an aiming indicator which works with the scope reticle.